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Looking for the best time to buy airline tickets to get a cheap flight to everywhere? We’ve got you covered anytime, anywhere. Here’s how to find the best deal for flight booking no matter where you want to go in the world.

Which day of the week is the best day to buy cheap airline tickets?

For both U.S. domestic and international travel, Sundays can be cheaper for airline ticket purchases. Fridays tend to be the most expensive day to book a flight. Booking on the right day of the week could save you up to 6% on your airfare, according to historical data*.

When is the best time to buy airline tickets?

Based on 2020 And 2021 global flight data for Economy tickets, prices usually start to increase 56 days before departure for domestic flights. When traveling internationally, prices usually start to increase 21 days before departure*. Keep in mind that this isn’t a hard-and-fast rule; keeping an eye on prices is a good idea when trying to find the best airfare deals. Compare fares across different airlines, and set up a price alert for your preferred route.

Which are the cheapest days to fly?

Analysis of domestic and international airfare prices shows that flying out on Fridays can be cheaper. Many travelers start their trips on Sundays, so your chances of a lower price are better when departing early in the week instead. Starting your trip on a Friday could be almost 11% cheaper than air travel on Sundays, so book flights online wisely*!

Which is the cheapest month to fly?

The cheapest month to fly can vary depending on where you’re going, so finding the best rates largely comes down to avoiding peak travel times for your destination. If you’re looking for cheap international flights , the most expensive month tends to be February, while the cheapest is November with cheap flights in November offering potential savings of up to 34.6% relative to February. Cheap domestic flights work a bit differently, with March being the most expensive and August being the least expensive with cheap flights in August offering savings of up to 35%*.

How can I find the cheapest flights on Expedia?

Compare cheap airline ticket prices at a glance from a large inventory of carriers on Expedia. You can get cheap flights by staying flexible with travel dates, carriers, and nonstop/layover flights to get the best price. Insider tip: Become a member (it’s free!) to earn rewards back on every booking. We make your travel stress-free and source incredible airfare deals so you can sit back, relax, and start your vacation or business trip.

How can I save money on flights?

Mixing and matching airline tickets and fare types could help save money on airfare to your destination. Easily compare prices for carriers, arrival and departure dates, airplane cabin class, and more when you book with Expedia. Booking your plane ticket on a Sunday, and departing on Friday, could possibly save you money* based on historical data. You can also filter for flights based on your budget, such as looking for cheap flights under $200 specifically.

How can I get cheap last-minute flight deals?

The historical data analysis of flight pricing patterns shows that you can still find amazing airfare deals 3 weeks prior to departure* when traveling domestically. International last-minute flights offer great deals 2 weeks prior to departure if you’re flying premium, but economy travelers may want to strive for no less than 4 weeks out*. Try to stay flexible with travel dates, airports, and nonstop/layover flights to find the cheapest flights on Expedia. Whether you’re planning a quick business trip or a spontaneous holiday with friends, you’ll have your choice of last-minute flights, roundtrip, or multicity flights on Expedia. You’ll find everything you need for your travels all in one place — and all at the right price.

How do I book with Expedia?

Booking your flight with Expedia is easy, as all you have to do is implement your travel dates, departure destination, like flights from Atlanta or flights from Hartsfield-Jackson , and arrival destination into the search. Then, all the available flights for those dates and destinations will appear. You can use search filters to narrow down the results as well based on a variety of factors like the airline, number of stops, departure time, and policies like seat choice and refundable bookings. Additionally, travelers may alter their search for round-trip flights, one-way flights, and multicity flights.

What should I look out for when booking flights?

Several factors go into any flight booking, and you’ll need to keep an eye out for them all to ensure that you get the travel time, luggage policy, airline, and class you want. Consider which airport is closest to your ultimate destination (travelers to Los Angeles may prefer flights to LAX over flights to PSP , and make sure that the flight will accommodate all the luggage you plan on bringing. Additionally, consider the different flight classes including economy flights for functionality and premium flights if you want to enjoy a more relaxing experience.

Where’s the cheapest place to travel?

The cheapest place to travel can be in the same country, like Chicago. Flights to Chicago are fairly affordable no matter where you’re coming from in the continental United States. Flights to Las Vegas tend to be pretty affordable as well. While the Vegas airport isn’t a hub for any major airline, it does have plenty of competition to keep prices relatively low.

Where can I fly for cheap?

Staying within a strict budget still allows you to find plenty of cheap flights, even to destinations like Puerto Rico. In fact, flights to Puerto Rico don’t even require U.S. citizens to have a passport. Flights to Alberta and other destinations in Canada can be fairly affordable as well.

Is it cheaper to buy flights last minute?

Flight tickets can be cheaper at the last minute depending on how late you’re actually booking, where you’re going, and the kind of flight you opt for. For domestic flights with Economy tickets, prices usually start to increase 3 weeks before departure, and 4 weeks for international flights, according to historical data*.

Are fully refundable flights available?

Yes, several fully refundable flights are available and will be labeled as such right on your search results page in green text. You may also filter for fully refundable flights specifically to eliminate all flights from your results that don’t qualify. Just make sure to check the specific policy for each flight before booking.

Why should I book my flight with Expedia?

Booking with Expedia makes finding a flight easy, but that’s just the beginning of everything you can take advantage of. We also offer hotels, car rentals, and even activities that you can purchase with package deals available for travelers planning more than one aspect of their trip at a time. Plus, Expedia offers stunning cheap flight deals that can help you save with ease. As a One Key member, you will earn OneKeyCashTM for every eligible booking that you can use to save on future bookings. Plus, OneKeyCash can be earned on top of airline miles.

*Data specialists from both ARC and Expedia Group analyzed ARC’s global flight data to distil actionable information to help people save money on travel. While it’s impossible to guarantee when to find the lowest prices, after examining the variables, we were able to observe trends. Best day of the week to book and best day of the week to depart is based on average round-trip ticket prices for January through August for 2021, sourced from ARC’s global airline sales database. Best month to depart recommendation is based on average round-trip ticket prices for January through December for 2020, sourced from ARC's global airline sales database. Best time to book recommendation is based on average round-trip ticket prices for January through August for 2021 & average round-trip ticket prices for January through December for 2020, sourced from ARC's global airline sales database. OneKeyCash is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

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The 12 Best Websites for Booking Flights at the Cheapest Prices [March 2024]

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The 12 Best Websites for Booking Flights at the Cheapest Prices [March 2024]

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Searching for a flight can be a bit overwhelming. There are so many factors: dates, times, price, fare class, airline, and more. Even when you know exactly when and where you want to fly, where should you look for the absolute best price?

Unfortunately, no website consistently has the lowest prices. Most of the popular OTAs (Online Travel Agencies) are usually in the same ballpark for the price, but not all offer the same benefits or search functionality.

We’ve combed through many popular OTAs to compare prices and show you the benefits and drawbacks of each site.

More often than not, booking directly through the airline’s website will give you the best price, or will at least be the same as the OTAs.

Some airlines, like Southwest, won’t even show up on sites like Expedia or Orbitz, so you have to book direct. It can also be the most simple way to book. If a problem arises, you don’t have to deal with a third party to get it resolved.

Another reason to book directly through an airline’s website is to use those frequent flyer miles — hooray for award flights!

Of course, to book through the airline’s website, you first need to know which airline has the best prices. There are lots of travel search engines and OTAs that can help you find the best deals so you know which airline’s website to visit. Some OTAs even offer perks that might make it worth booking someplace other than the airline’s site.

Hot Tip: A card such as The Platinum Card ® from American Express earns an impressive 5x Membership Rewards points per $1 spent on flights booked directly with airlines or with  AmexTravel.com on up to $500,000 on these purchases per calendar year.

Momondo is a travel metasearch engine similar to Kayak. The home page displays a simple search box where you can plug in your travel details.

One of the things we love about this site is the visual way it shows you the price trends for your flight. At first glance, you can tell if you could save some money by shifting around your travel dates a bit. It also offers a price tracker and lots of filtering options on the left-hand side of the screen.

Monmodo flight search

It also offers Mix & Match fares (formerly Hacker Fares) which are simply 2 one-way tickets from different airlines packaged together to get you the best deal. However, unlike other sites, you must go to 2 separate websites to book these types of tickets.

Pros and Cons of Momondo

  • Great price tracking tools
  • Mix & Match fares require you to make 2 separate reservations; this is usually handled “behind the scenes” on other websites

Hot Tip: We cover the ins and outs of finding cheap airfare with this website in our guide to using Momondo .

Kayak is not an OTA. Rather, it’s a travel search engine — making it a great place to start your flight search.

The site compares prices from many different websites all in a single spot, so you can easily see where the cheapest options are. Most of the time, you’ll click through to a different site to complete your booking.

Kayak offers the ability to combine 2 one-way tickets (usually on different airlines) in 1 itinerary, which is a great way to save money on your flight. These itineraries can be pretty good deals and something that doesn’t always appear in search results of other websites.

Pros and Cons of Kayak

  • Ability to combine 2 one-way flights on a single itinerary
  • Price Alerts to keep an eye on flight prices
  • Kayak offers the most benefit when your travel plans are very flexible; many of its most valuable tools help you search for deals, so this site might be less appealing when you have a specific flight in mind

Bottom Line: For more information about Kayak’s travel search tools, check out the complete guide to booking travel with Kayak .

Daily Deals Special: Click here for up to 40% off at Expedia

Expedia is another tried-and-true OTA that people have been using since the 1990s. Back then, Expedia was a go-to source for searching and booking flights. But how does it stack up now?

As far as price goes, you aren’t necessarily getting a better deal booking through Expedia, but you aren’t paying any more than you might on the airline’s website.

A nice perk of using Expedia is that it offers a rewards program called One Key. This program offers member pricing plus the ability to earn points for flights, hotels, car rentals, cruises, activities, and more.

The One Key loyalty program is also used by Hotels.com and Vrbo.

If you’re a member of an airline’s frequent flyer program, you’ll be happy to know that you can still earn airline miles on a flight booked through Expedia . However, you often won’t be able to earn miles toward status or be eligible for seat upgrades.

Pros and Cons of Expedia

  • Earn and redeem points through the One Key program
  • Booking through Expedia may limit your mileage earned toward elite status
  • Your ability to be eligible for upgrades can be limited when you book through Expedia

Hot Tip:  For more information, check out our post about how to use Expedia to find great deals on flights, hotels, vacation packages (and more).

Priceline is a popular OTA that introduced the Name Your Own Price tool and opaque bookings. These types of bookings can offer discounts, but many of the details are hidden until after the booking. The Name Your Own Price tool was discontinued for flights in 2016, so now Priceline operates like most other OTAs out there.

One of the nice things about searching for flights on Priceline is that it has a nice color-coded calendar, so you can easily see which days offer the lowest prices.

Priceline color coded map

The search results on Priceline are clear and easy to navigate. As you scroll through your search results, you can easily see the cheapest nonstop options and things like flights with no change fees or early bird flights.

Priceline search results

Another way to save money is by looking at Priceline’s Express Deals . These “opaque bookings” are ones where select details of the flight (like the departure, arrival times, or even the airline) are hidden until the booking is complete.

Pros and Cons of Priceline

  • Express Deal flights can offer a good discount if you have some flexibility; many of the details of the flight, including airline and arrival and departure times, are hidden until the booking is complete
  • Color-coded calendar and easy-to-read search results
  • Price Match Guarantee
  • Free online cancellation within 24 hours of booking (except for Express Deal flights)
  • No rewards program
  • Express Deal flights can be good deals, but they can sometimes be even more expensive than a standard booking

Bottom Line: For more information, check out the complete guide to booking travel with Priceline .

Daily Deals Special: Check out Orbitz’s Daily Deals

Orbitz is another reliable OTA that has been around since 2001. One thing that makes this site a little different is that it offers its own rewards program called Orbitz Rewards . You can earn Orbucks when you book hotels, flights, and vacation packages through Orbitz. However, you can only redeem Orbucks for hotels.

When booking a flight through Orbitz, you’ll earn 1% of your purchase price back as Orbucks (or 2% if you use the Orbitz mobile app). If you book a $500 flight, you will earn 5 Orbucks, which is worth $5 toward a hotel booking. Joining the Orbitz Rewards program is free.

Earn Orbucks on flights

Unfortunately, Orbitz sometimes charges a 1% booking fee . Keep an eye out for these on your trip summary page before finalizing your purchase, and factor them into your calculations to see if you’re getting a good deal or not. While earning Orbucks is great, paying a booking fee could wipe out all of the benefits.

Orbitz booking fee

Pros and Cons of Orbitz

  • Orbitz Rewards lets you earn Orbucks that can be applied to hotel bookings
  • 24-hour cancellation policy
  • Low Price Guarantee: if you find a lower price for your flight on another website within 24 hours, Orbitz will refund the difference
  • Flight booking fees

Bottom Line: For more information, check out our guide to booking travel with Orbitz .

Agoda is an OTA owned by Priceline. This website doesn’t offer much more than a simple search with limited filter options when looking for flights. If you’re looking for unique accommodations such as an apartment or private villa, Agoda is worth checking out, but it doesn’t offer much when searching for flights.

One cool thing about Agoda is that the site is multilingual. You can select your language by clicking on the flag in the top menu bar.

Agoda

Pros and Cons of Agoda

  • Simple search functionality
  • Multilingual option
  • Limited filtering options for flights

Hot Tip: Agoda has a loyalty program called VIP, but it only applies to hotel stays. For more information, check out our guide to booking travel through Agoda .

Special: See these Hotwire Flight Deals

Hotwire is a popular OTA that has been around for almost 20 years.

The simple home page offers the main search box to input your departure and arrival cities as well as your desired dates of travel.

Hotwire can offer a great deal when booking a hotel along with your flight . Many times during the booking process, you’ll see pop-ups or prompts advertising great savings when booking a hotel at the same time. We tested it, and every time we priced out a Hotwire vacation package deal against purchasing a flight and hotel separately, the package deal was cheaper.

Hotwire flight and hotel deals

Bottom Line: If you need a hotel in addition to your flight, booking both together through Hotwire can save you money.

One other thing to keep in mind when using Hotwire to find great flight deals is that sometimes a booking fee will be charged.

Pros and Cons of Hotwire

  • Package deals that include a hotel stay can save money
  • Low Price Guarantee
  • Hotwire can sometimes charge a booking fee

Bottom Line: For more details about finding great deals, check out our complete guide to booking travel through Hotwire .

Skyscanner is another travel search engine that does not sell flights directly. It shows you a list of flights and links to the airline’s website or OTA to complete the purchase.

This site excels for travelers with flexibility . In the search box, you can select Explore everywhere  to search for the cheapest destinations on your chosen dates.

Skyscanner search option

If you have a set destination with specific dates, Skyscanner operates like most other travel search sites.

Pros and Cons of Skyscanner

  • Flexible searches, including Explore everywhere  and Multi-city search
  • Easy to change language and currency
  • Price alerts

Hot Tip:  For more information, check out our in-depth piece on Skyscanner . 

Travelocity is yet another OTA that has been around for a while and is very similar to the other websites we’ve been looking at.

On the plus side, there are some nice filtering options to help you find the best flight for your needs. On the downside, prices can change between selection and booking. We did a dummy booking, and by the time we got to the payment section, the flight price had gone up from $157 to $338!

Travelocity flight price change

Much like other online travel agencies, Travelocity can also charge booking fees, so keep an eye out for those in the payment section of the booking process.

Travelocity booking fee

Pros and Cons of Travelocity

  • Price Guarantee: If you find a lower price on an identical itinerary within 24 hours, Travelocity will refund the difference in price
  • Free cancellation on flights within 24 hours of booking (on most airlines)
  • Travelocity sometimes charges a booking fee
  • Prices can change between flight selection and payment

Bottom Line: For more information, check out our guide to booking travel with Travelocity .

Google Flights is not an OTA. Rather, it’s a metasearch engine similar to Kayak. Once you find a flight, Google Flights will link you to the airline’s direct website or an OTA to complete the purchase. It is a powerful search engine built on the ITA Matrix , which was originally developed for travel agents.

This site shows you price trends and how your date of travel could affect the cost of your ticket. Plus, it allows you to track the prices of a route , so you can jump on low prices when they pop up. These features make Google Flights a great tool to help you feel confident that the price you’re getting is a good deal.

Google Flights Price Graph

Google Flights recently rolled out a price guarantee feature on select flights departing from the U.S. If you book a flight with the price guarantee badge and the price drops, you’ll get a refund of the difference (with a maximum of $500 per calendar year) from Google Flights via Google Pay. However, you can only receive up to 3 price guaranteed refunds at any one time.

Google Flights price guarantee

Pros and Cons of Google Flights

  • Price graph shows you the pricing trends for your route and allows you to see what days might be cheaper to fly
  • Price tracking will send you an email when your flight’s price increases or decreases
  • Automatic price guarantee on select flights
  • Since this search engine is so powerful with lots of options, it could get complicated for a novice traveler

Hot Tip: You can earn frequent flyer miles on flights booked through an OTA, but you might not earn miles toward elite status.

CheapOair is an OTA that offers its own credit card. Before you go apply for the card, we recommend considering choosing a better travel rewards credit card  for more lucrative and flexible travel rewards.

This site might not be as cheap as you would think. That’s because it can charge expensive “agency fees.” For most flights, the fees can be up to $35; however, once you read the fine print, you’ll see they can actually be as high as $200 per ticket!

Cheapoair agency fees

In addition, CheapOair charges a fee to change or cancel any ticket, including within 24 hours, which is free on many other sites.

Pros and Cons of CheapOair

  • Price Match Promise: CheapOair will refund the difference in price if you find a lower price on the same itinerary on a major OTA within 24 hours of booking
  • CheapOair charges hefty booking fees in addition to fees to cancel or change your flight
  • Price Match Promise is very limited; the guarantee is only good for identical flights on Expedia, Orbitz, Priceline, and Travelocity

Bottom Line: CheapOair might not be cheap after all. It advertises low base fares, but it charges booking fees, which usually result in a higher price than the airline’s website. For more information, check out our guide to CheapOair .

Hopper is an app that tries to predict the right time to buy a flight. It claims that using its app can save you up to 40% on flights. The simple interface and color-coded map show you the cheapest and most expensive times to fly to your chosen destination.

Hopper Fare Calendar

You can also set up alerts to watch the prices for your specific dates or watch a whole month if you have flexible travel plans.

Pros and Cons of Hopper

  • Easy to use
  • Choose to watch prices for a specific trip or choose to watch prices over a whole month
  • No ability to search on a desktop
  • Few filtering options

Hot Tip: There are many credit cards with travel insurance and extra protections like trip interruption and cancellation protection and baggage delay coverage . We suggest looking at Chase credit cards or Amex credit cards for great insurance coverage.

We searched for a flight from Los Angeles (LAX) to New York City (JFK) across different travel booking websites to compare pricing head-to-head. Below is the cheapest ticket each website offered.

In this search, we weren’t taking anything other than price into consideration. When you are actually booking a flight, there will most likely be more factors that go into your decision of which flight to book.

In this example, Google Flights, Hopper, and Priceline tied for the cheapest flight cost with Expedia, Hotwire, Orbitz, and Travelocity coming in just $3 more expensive. CheapOair was by far the most expensive option.

There is no one-stop shop to find the lowest prices on a flight every time. Most OTAs are in the same ballpark when it comes to price.

If you’ve got some flexibility, many of these sites can help you find the lowest-priced travel dates and destinations.

If you prefer a more traditional booking, start out with a travel search engine like Kayak or Google Flights to search all of the other sites. That will give you a good idea of the best website to use to save the most money on your next flight.

Are you a student? Don’t miss our guide to the best websites for cheap, discount student flights .

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The Best Websites for Booking Flights at the Cheapest Prices

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Frequently Asked Questions

What is the best website to use to book the cheapest flights.

There is no single website that has the cheapest flights all of the time. Most of the travel search engines and online travel agencies all have similar pricing, however you can find some really nice deals when looking at opaque (hidden) bookings or vacation packages.

What is an opaque booking?

An opaque booking hides many of the flight details, including arrival and departure times and the operating airline, until your booking is complete. Many sites including Hotwire, Orbitz, and Travelocity offer these types of bookings.

Will I earn frequent flyer miles when I book through an online travel agency?

Generally, yes, you will still be able to earn frequent flyer miles on flights booked through an online travel agency. However, miles earned to qualify for elite status may be not be awarded unless you book directly through the airline’s website.

What are the best websites to buy cheap flights to Europe?

Your best bet would be to start with a travel search engine like Kayak or Google Flights. You will be able to see prices from many different websites in one place and you can track flight prices to help determine the best time to purchase tickets. Be sure to check out our guide to the best websites to book European vacation packages if you want to bundle your flight with a hotel and/or rental car.

Is it cheaper to book directly on the airline's website?

Often, an airline will offer the lowest prices through its own website. However, you can often save money booking through an online travel agency (OTA) that has the ability to combine flights from more than 1 airline into a single itinerary.

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About Katie Seemann

Katie has been in the points and miles game since 2015 and started her own blog in 2016. She’s been freelance writing since then and her work has been featured in publications like Travel + Leisure, Forbes Advisor, and Fortune Recommends.

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The 14 Best Flight Search Sites for Booking Cheap Airfare

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Contributing Editor Carl Unger believes that every trip is worth taking. He loves an extended trip to Europe as much as he enjoys exploring the towns and landscape near home. Basically, you'll find him wherever there is good food, fresh air, and plenty of stories to bring home.

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Wondering which website you should be booking your airfare with to get the best deal? You’re not alone. There are seemingly endless options when it comes to choosing the best flight booking site these days.

In addition to the option of booking directly with your airline, there are dozens of flight booking websites, also known as online travel agencies (OTAs), to choose from. The uncomfortable truth is that no one flight search engine can guarantee the best price 100 percent of the time, but using a mix of the right resources can help ensure you’re not overpaying.

The Best Flight Booking Sites

One important thing to remember about booking sites/OTAs is that Southwest fares are not sold on them. Some other airlines have also pulled their fares from some booking sites , but most airlines do make their fares available.

Here’s why these 14 are the best flight booking sites and metasearch options out there, and the best defining feature of each. Since it’s impossible to know which site will provide the best price for your particular trip, you should always compare fares from a few sources before you book.

Best Flight Search Site for Comparing Flight Types: Travelocity

best travel sites for flights

It should be noted that Expedia owns Travelocity , so this flight booking site basically gives you Expedia price results with a different color scheme and organizational preferences. Travelocity’s homepage is streamlined but doesn’t offer a flexible-dates search. On the results page, bag fees are revealed by a pop-up screen that activates when clicking each fare, which makes it a little difficult to compare fees (you will likely have to scroll a bit). Travelocity charges booking fees for some but not all flights.

Best Feature: Travelocity displays all fares for a selected flight in a convenient pop-out window, allowing you to compare fares on a given itinerary while still scrolling through options from the search results on the same screen.

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Best Flight Search Site for Comparison Shopping: BookingBuddy

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Editor’s note: BookingBuddy is owned by SmarterTravel Media, SmarterTravel.com’s parent company.

Compare multiple airfare sites with one click to find the best flight deals on BookingBuddy . This metasearch site lets you easily compare prices from other sites (like Priceline) without having to do a bunch of different searches. You can choose which flight search sites you want to compare, and BookingBuddy opens up a new tab with your selected flight dates and destinations already filled in.

Looking for a flight and hotel? BookingBuddy offers a combination flight and hotel search that can save you some decent money by bundling.

Best Feature: Sign up for a price drop alert, and BookingBuddy will email you when costs drop on your route.

Best Flight Search Site for Transparency: Expedia

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As previously mentioned, Expedia is nearly identical to Travelocity, but fares did vary between the two sites on some of my searches. As with Travelocity (and to be fair, a number of other OTAs), Expedia will try to up-sell you on adding a hotel to your itinerary. This can save you money, but be sure to compare prices before you book. Expedia charges variable booking fees (and they are not always the same fees that Travelocity charges). When you select your fare from the list of options, there’s an interstitial step that displays what is and isn’t covered in the fare, including seat selection, cancellations, changes, and baggage rules.

Best Feature: Like its subsidiary Travelocity, Expedia basically double-checks that you understand what sort of fare you’re choosing before you click “select” again. It’s a helpful bit of transparency in today’s cluttered airfare landscape.

Best Flight Search Site for Nonstop Flights: CheapOair

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Much like Travelocity and Expedia, flight search sites CheapOair and OneTravel (discussed later in this article) are versions of the same product, owned by Fareportal Inc. Though the sites are owned by the same company, the fare results are not always identical, so it’s worth checking both. CheapOair shows some “Super Saver Fares” for which you don’t find out the airline you’ll be flying until after you book—which means you also don’t find out what baggage fees apply until after you book. However, the savings might be worth it. CheapOair charges a service fee on air travel transactions, from $0 to $35 per ticket.

Best Feature: CheapOair prioritizes nonstop prices over itineraries with stops, organized in an easy-to-read chart that’s organized by airline.

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Best Flight Search Site with Flight Reviews: Tripadvisor Flights

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Tripadvisor is known for its hotel reviews, and now travelers can apply their ratings to airlines, plus search for airfare on Tripadvisor Flights . On testing this flight booking site it’s clear that Tripadvisor doesn’t always serve up the cheapest fares, but sometimes it did. It always, however, gives you the option to surface Expedia, Travelocity, and other flight booking sites’ results, so you can compare right away with one click. Tripadvisor Flights also has some helpful search options up front, like a checkbox for prioritizing nonstop flights.

Best Feature: Tripadvisor’s flight search tool is unique from others in that it offers review-based FlyScores of airlines alongside their fares, so you’re less likely to book with an obscure, poorly rated airline without realizing it.

Best Flight Booking Site for Environmentally-Conscious Flyers: Skyscanner

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Skyscanner is a popular metasearch site that works with hundreds of other travel providers to find the best fares. You can specify nonstop-flights-only right from the homepage, and there’s also a handy “everywhere” option if you don’t have a particular destination in mind and want to see what’s available. Search results show the “best” option (based on a combination of price and speed) as well as the fastest and cheapest, and you can filter by airline, alliance, number of stops, and flight times. When you select a result, you’ll see a variety of places to book that particular flight. Skyscanner casts a wide net, so you’ll often see very cheap fares from booking sites you’ve never heard of; to help you figure out how trustworthy they are, Skyscanner shows user star ratings for each.

Best Feature: For flyers concerned about the environmental impact of their travel, Skyscanner has a unique “Greener flights” filter, which shows only itineraries with lower-than-average CO2 emissions based on your search. The site also highlights certain itineraries in your results as a “greener choice.”

Best Flight Booking Site for Flexible Travel: OneTravel

best travel sites for flights

OneTravel has a similar interface to CheapOAir, with a convenient chart prioritizing the best nonstop flight options at the top of the results page. The search results automatically populate similar but cheaper flights on alternate dates close to the user’s original search date, which is great if there is flexibility in your plans. If you are committed to your arrival and departure dates, however, you can toggle off alternate dates in the filters section. One major drawback: OneTravel charges a steep service fee of up to $50 per ticket.

Best Feature: The search results page is subdivided into Recommended, Cheapest, Shortest, and Alternate Date tabs, making it easy to find exactly what you’re looking for at a high-level and continue to filter down from there.

Best Flight Booking Site for People on a Budget: Travelzoo

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Travelzoo is quite different from the other sites listed here. Instead of booking specific itineraries, you can search broad timelines (this week, next month, this summer, etc.) for deals in your desired destination by either month or season. This makes Travelzoo a good fit for people with a budget and time frame, but no firm idea of when or even where they want to go. The downside is that if you do have specific plans in mind—for example, you need a flight to Omaha in March—Travelzoo is not likely to be helpful.

Best Feature: Travelzoo’s flexibility requirement can afford some great deals you won’t find elsewhere, like cheap business-class flights and multi-city itineraries that will make a dream trip a lot more affordable than you’d think.

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Best For Where You Don’t Care Where You Go, You Just Want a Good Price: Google Flights

Open laptop showing the flight search homepage for Google Flights

Google Flights is a powerful, simple metasearch site that comes free of ads and distractions. After you enter your departure and arrival airports, the calendar pre-populates with prices so you can target dates with lower fares. Once you have your results, you can track fares on your selected dates and receive updates by email. You can also view fares over various dates using the “Price Graph,” which shows you a bar graph that makes it easy to see when the lowest fares are available.

Best Feature: Instead of putting in a certain city as a destination, you can put in a larger region such as Europe or South Africa. You’ll then see fares to various cities within that region displayed all at once on a map. This can be helpful if you want to go to Europe in April, for example, but don’t have a particular destination in mind.

Best Flight Booking Site for Filtering: Kayak

best travel sites for flights

Often imitated and frequently duplicated, Kayak was a game-changer when it launched back in the mid-2000s. And it’s still one of the most powerful metasearch tools available. You can also set up fares alerts to track prices over time. The interface is noisier than Google Flights thanks to a preponderance of ads, but still easy to use. Like Google, it has a flexible search feature that lets you search for good deals to a region like Europe or even simply put in “anywhere.” Another handy feature available on many itineraries: an “Our Advice” box that lets you know whether you should buy now or wait, depending on whether Kayak thinks fares will go up or down over the next seven days.

Best Feature: Its Hacker Fares claim to piece together separate one-way tickets, potentially saving you money compared to similar itineraries, and its wide range of filters, sorting options, and predictive technologies put a lot of tools at travelers’ disposal.

Best Flight Booking Site That Included Southwest: Momondo

best travel sites for flights

Like Kayak, Momondo is a metasearch site that takes you to other sites to make your purchase. One plus: Momondo surfaces results from Southwest, including flight times and other details from the carrier … but no prices. Only by clicking through to Southwest could I see the fare. Still, it’s nice to have a reminder that Southwest is an unlisted option. Another plus: Momondo searches for fares from a ton of smaller OTAs, which could lead to a deal that other metasearch tools miss.

Best Feature: The mention of Southwest is unique to Momondo.

Best Flight Booking Site for Multi-Stop Itineraries: Nomad from Kiwi.com

best travel sites for flights

Kiwi.com is an OTA like many others; you book directly on the site (as you would on Expedia) rather than being linked off to a different site (as you would on Kayak or Momondo). But what sets it apart is its Nomad search engine, which lets you find cheap itineraries for multi-destination trips. You enter the starting and ending places of your journey as well as the cities where you want to stop along the way, including how many nights you want to spend in each place. Hit “find routes,” and the site will put together an itinerary that mixes and matches airlines and routes for the lowest possible price. (For example, I was quoted a route involving four flights—New York City to Rome to Moscow to Tokyo and back to New York—for a measly $1,031 round-trip.) You can filter your results to weed out routes with multiple layovers or flights that don’t include checked baggage.

Best Feature: This is by far the easiest tool I’ve used to research around-the-world and multi-stop itineraries.

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Best Flight Booking Site for Fare Alerts: Airfarewatchdog

best travel sites for flights

Full disclosure, airfarewatchdog is a sister site to SmarterTravel, so we are slightly biased with this one, but promise it is worth your while. Airfarewatchdog is the best for flexible travelers who are just looking for a great deal on airfare. Search fares from a city, to a city, or you can “ choose an adventure ,” which will show you fares from your city to various hotspots depending on what you are looking for – castles, caves, coffee, you name it, airfarewatchdog will point you in the right direction. Their blog features great travel tips, and one of the best features is the fare alerts you can sign up for. If you know you want to travel somewhere, but all you want is a cheap price, sign up for an alert, and you’ll find out as soon as the price dips so you can book it right away.

Best Feature: The fare alert—it allows you to stop searching daily for that perfect price! Let airfarewatchdog do the work for you.

Best Mobile-Friendly Flight Booking Site: Hopper

best travel sites for flights

Hopper is primarily an app for your phone (although it can be used as a website ) but it is worth putting on here just the same. Have you ever been scared to book a flight because it might go down, or afraid to not book it in case it goes up? One of the features of Hopper that makes it shine is its price predictor, which means you never have to worry about making the wrong booking decision. Another bonus is it shows you the price with all of the fees and taxes included, so there is no sticker shock when you finally go to book. After you search, if you aren’t ready to book, you can set up an alert to watch that trip, dates and all. 

Best Feature: Hands down the price predictor. 

Which Flight Booking Site is Best for Me?

In determining which of these sites are the best ones for you to compare prices with, it’s helpful to determine which sites meet your trip-booking needs. Do you want to clearly see bag fees up front? Do you want an easy “flexible dates” function, or are your dates firm? If your travel plans are loose, do you want to see prices for multiple destinations? Different flight booking sites have different capabilities.

Once you determine which site is worth your time depending on the trip, compare prices with a few to make sure you’re getting the best deal. And always check the airline’s own site: OTAs are good at displaying fees associated with an individual flight, but it’s trickier to compare fare options (classes like basic economy vs. economy) on that flight.

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Lastly, it’s important to remember that this list can be separated into two main types: booking sites (also called OTAs) that you book directly with as a third party, and aggregators otherwise known as metasearch sites that’ll send you to a booking site to make your transaction. The latter are better if you want to use any frequent flyer programs you might belong to and acquire points.

Editor’s note: This story was originally published in 2019. It has been updated to reflect the most current information. Sarah Schlichter and Megan Johnson  contributed to this story. Some of the links featured in this story are affiliate links, and SmarterTravel may collect a commission (at no cost to you) if you shop through them. As an Amazon Associate, we earn from qualifying purchases.

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We hand-pick everything we recommend and select items through testing and reviews. Some products are sent to us free of charge with no incentive to offer a favorable review. We offer our unbiased opinions and do not accept compensation to review products. All items are in stock and prices are accurate at the time of publication. If you buy something through our links, we may earn a commission.

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How to find cheap flights, what is the best day to buy a plane ticket.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.

*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

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    Compare cheap airline ticket prices at a glance from a large inventory of carriers on Expedia. You can get cheap flights by staying flexible with travel dates, carriers, and nonstop/layover flights to get the best price. Insider tip: Become a member (it’s free!) to earn rewards back on every booking.

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    Travelocity. $401 (American/Delta) In this example, Google Flights, Hopper, and Priceline tied for the cheapest flight cost with Expedia, Hotwire, Orbitz, and Travelocity coming in just $3 more expensive. CheapOair was by far the most expensive option.

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