Best Best app to book flights in 2026: 8 Options Compared

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By the Ainotely Editorial Team.
Updated November 2026. 10 min read. Prices and features researched from each vendor's official pages and app store listings at time of writing.
Best Best app to book flights
Quick picks
  1. 1Google Flights logo
    Google FlightsComparing fares and tracking prices
    Visit
  2. 2Skyscanner logo
    SkyscannerFlexible dates and budget airlines
    Visit
  3. 3KAYAK logo
    KAYAKComparing many booking sites at once
    Visit
  4. 4Hopper logo
    HopperPrice predictions and fare watches
    Visit
  5. 5Expedia logo
    ExpediaBundling flights with hotels
    Visit
Short version:
In this guide Quick comparisonThe best apps to book flightsHow we picked theseHow to choose the right option for youFrequently asked questionsSources

Quick comparison

ProductIdeal forPrice fromFree version
Google FlightsComparing fares and tracking pricesFreeYesVisit
SkyscannerFlexible dates and budget airlinesFreeYesVisit
KAYAKComparing many booking sites at onceFreeYesVisit
HopperPrice predictions and fare watchesFreeYesVisit
ExpediaBundling flights with hotelsSee websiteNoVisit
Kiwi.comUnusual multi airline routesFreeYesVisit
MomondoA second opinion on faresFreeYesVisit
GoingCurated flight deal alertsSee websiteYesVisit

The best apps to book flights

We compared official feature pages, pricing pages, app store listings and public reviews to build this list of best app to book flights. The options below cover well known leaders and smaller choices that fit specific needs, so you can find a match without trying every product yourself.

Google Flights logo
#1

Google Flights

Ideal for: Comparing fares and tracking prices

Google Flights website
google.com homepage

A good starting point is Google Flights works best as a research desk before you buy. Its price graphs and tracking alerts make it simple to spot a fair fare for a route, and it links out to airlines and booking sites so you can compare the final total. For most travelers, starting here avoids paying more than a route usually costs. On pricing, this option lists a starting price of Free, with a free plan status of Yes. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Clear price history and tracking
  • Wide airline coverage
  • Easy date flexibility views
  • Does not book every small carrier directly
  • Price guarantee is limited
Skyscanner logo
#2

Skyscanner

Ideal for: Flexible dates and budget airlines

Skyscanner app screenshots
App Store screenshots

For readers who want a clear fit, Skyscanner suits travelers who can move their dates by a day or two. Its month view and everywhere search surface cheaper combinations that a fixed date search would miss. Check the seller before you pay, and prefer the airline direct link when the price is close. On pricing, this option lists a starting price of Free, with a free plan status of Yes. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Whole month views
  • Broad airline and agency coverage
  • Flexible destination search
  • Some linked agencies have weak service
  • Final price can differ at checkout
KAYAK logo
#3

KAYAK

Ideal for: Comparing many booking sites at once

KAYAK website
kayak.com homepage

What stands out here is KAYAK is a good second check after Google Flights or Skyscanner. It pulls fares from many sources, so a fare that looks high in one place may appear lower here. Its buy or wait guidance is useful context, but the final decision should rest on the total price and the change terms. On pricing, this option lists a starting price of Free, with a free plan status of Yes. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Strong fare forecasts and alerts
  • Hotel and car search in one place
  • Flexible filters
  • Forecasts are estimates, not promises
  • Some results come from third party sellers
Hopper logo
#4

Hopper

Ideal for: Price predictions and fare watches

In practice, Hopper is best for the book now or wait question. Its predictions give a plain read on whether a fare is likely to fall, and watches alert you when a route moves. We still suggest buying direct from the airline when the price matches, since direct bookings are usually easier to change. On pricing, this option lists a starting price of Free, with a free plan status of Yes. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Color coded price predictions
  • Fare freeze options on some trips
  • Simple mobile booking
  • Predictions can miss sudden changes
  • Booking through an app adds a middleman
Expedia logo
#5

Expedia

Ideal for: Bundling flights with hotels

The main reason to consider this option is Expedia earns its place when a trip needs a flight and a hotel together. Bundles can beat separate bookings, and the range of airlines and hotels in one checkout saves time. For a flight alone, compare it against a search tool first, since the lowest fare often sits elsewhere. On pricing, this option lists a starting price of See website, with a free plan status of No. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Bundle savings on some trips
  • Large inventory
  • Rewards on bookings
  • Standalone flight prices are rarely the lowest
  • Service fees can apply
Kiwi.com logo
#6

Kiwi.com

Ideal for: Unusual multi airline routes

Compared with the rest of this list, Kiwi.com is for travelers who accept some risk for a lower price or a route no single airline sells. Its combinations can open up trips that look impossible in a normal search. Read the transfer warnings closely, leave long gaps between separate tickets, and weigh the savings against a missed connection. On pricing, this option lists a starting price of Free, with a free plan status of Yes. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Finds self transfer combinations other tools miss
  • Virtual interlining
  • Fare alerts
  • Self transfers carry missed connection risk
  • Support can be slow during disruption
Momondo logo
#7

Momondo

Ideal for: A second opinion on fares

For this use case, Momondo is worth a quick check because it sometimes surfaces an agency fare that other tools do not show. Treat it as a cross check rather than a first stop. When a fare looks much lower than everywhere else, read the agency terms and the baggage rules before you commit. On pricing, this option lists a starting price of Free, with a free plan status of Yes. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Searches many agencies
  • Clear calendar views
  • Fare alerts
  • Owned by the same group as KAYAK, so results overlap
  • Agency quality varies
Going logo
#8

Going

Ideal for: Curated flight deal alerts

A practical way to judge this option is Going suits travelers who can be flexible about where they go next. Instead of searching route by route, you get alerts for fares that reviewers judged to be unusually low. It works best alongside a search tool, so you can verify the fare and book it before the deal expires. On pricing, this option lists a starting price of See website, with a free plan status of Yes. That matters because the cheapest headline price is not always the cheapest total, especially when add ons, per user fees or shipping change the final bill. Check the official pricing page for the plan that matches how you will actually use it, and look for limits on users, storage, exports or monthly volume before you commit.

The good and the bad
  • Hand checked deal alerts from your home airports
  • Premium tiers for more deals
  • Deals are mainly from US departures
  • You still book the flight yourself

How we picked these

We started with the topic itself, best app to book flights, and kept only products that truly fit it and work today. We checked official feature pages and pricing pages, app store listings where relevant, privacy policies for sensitive topics, and public reviews for signs of common problems. Products that could not be verified, or that only partly matched the topic, were left out rather than added to pad the list. We also weighed fit over fame. A well known product that misses the core need scored lower than a smaller option that handles that need well. That is why this list mixes leaders with niche choices, and why the best pick for most people may not be the best pick for you.

How to choose the right option for you

Start with your main job

Write down the one job you need best app to book flights to do most often. If a product handles that job well and the rest is a bonus, it will serve you better than a product with a long feature list that misses your core need. Trial the shortlist with that exact job, not with a demo task.

Check the total cost and the exit route

Compare the total cost for a year, including per user fees, add ons and shipping where relevant. Also check how easy it is to export your data or cancel. A low starting price that locks your data in can cost more later than a slightly higher price with a clean export.

Test support and reliability before you commit

Read recent public reviews for support response times and reliability, and test the free plan or trial with a real workload. A product that works well in a trial but slows under real use is a common disappointment, so give the trial a genuine task.

Frequently asked questions

Best flight apps?

For best app to book flights, start with the top options in this list and match them to your main need. Google Flights suits most people, while a specialist further down the list may fit a narrower need better. Trial two options before paying, and confirm current pricing on the official site.

Best app for flights?

For best app to book flights, start with the top options in this list and match them to your main need. Google Flights suits most people, while a specialist further down the list may fit a narrower need better. Trial two options before paying, and confirm current pricing on the official site.

Best apps for booking flights?

For best app to book flights, start with the top options in this list and match them to your main need. Google Flights suits most people, while a specialist further down the list may fit a narrower need better. Trial two options before paying, and confirm current pricing on the official site.

Best flight deal apps?

For best app to book flights, start with the top options in this list and match them to your main need. Google Flights suits most people, while a specialist further down the list may fit a narrower need better. Trial two options before paying, and confirm current pricing on the official site.

Is there a free option for best app to book flights?

Yes, several options on this list offer a free plan or a free tier, including Google Flights. Free plans usually limit features, users or volume, so check those limits against how you will use the product. A free plan is a good trial, even if you later upgrade.

How much should I expect to pay for best app to book flights?

Costs vary widely by product and plan, and many vendors list prices as See website when plans are custom or change often. Compare the total for a year, not just the monthly headline, and include per user fees or shipping where they apply.

Sources

  1. https://www.google.com/travel/flights
  2. https://www.skyscanner.com
  3. https://www.kayak.com
  4. https://www.hopper.com
  5. https://www.expedia.com
  6. https://www.kiwi.com
  7. https://www.momondo.com
  8. https://www.going.com