The best flight price tracker apps in 2026 (I've used all of them, here's the honest ranking)

I have a complicated relationship with Hopper.

Hopper is a flight price prediction app that tells you whether to buy now or wait, represented by a little rabbit who changes colour based on urgency. The rabbit was orange once when I was looking at flights to Bangkok. “Wait,” the rabbit said. “Prices will drop.” I waited. The prices went up by $80. The rabbit remained unapologetic.

I booked the higher price.

I still use Hopper. I also use five other things. Here’s what I’ve actually learned about flight price tracker apps after several years of compulsive searching for the best fare on my next trip.

What these apps actually do

Most “flight price tracker” apps do one or more of three things:

Search aggregation: Pull prices from multiple airlines and booking platforms in one search
Price tracking: Monitor a specific route and notify you when the price changes
Price prediction: Use historical data to estimate whether current prices are good, average, or high, and predict whether they’ll go up or down

Not all apps do all three, and the ones that do the third thing (prediction) vary wildly in accuracy. Real talk: flight price prediction is hard, because airlines adjust pricing dynamically based on demand and algorithm changes that no third party has full visibility into. The predictions are educated guesses at best. Sometimes very good guesses. Sometimes very confident wrong guesses.

Use the predictions as one signal among several, not as gospel.

Google Flights

Best overall. Start here for every search.

Google Flights is not technically an app in the traditional sense (it lives at google.com/flights and in the Google app), but it’s the most useful flight search tool available and the one I run every search through first.

Why it wins:

The calendar view. Once you’ve searched a route, switch to the calendar view and see the entire month of prices at once. You can immediately see that the 14th is $90 cheaper than the 12th. No other tool does this as cleanly.

Price tracking. Set a price alert on any route and Google will email you when prices change significantly. This is the most reliable automated tracking tool available. Set it up 2-3 months before your trip and let it run.

The Explore feature. Enter your home airport and click “Explore” instead of a destination. A map of the world appears with prices from your airport to various places. Filter by budget, dates, or trip type. This is how I’ve found several trips I didn’t know I wanted to take.

Nearby airports and dates. The search shows whether flying a day earlier or later, or from a nearby airport, saves money. Small toggle, big value.

What it doesn’t do: Kiwi-style combination fares (mixing airlines to create cheaper routes), deep low-cost carrier integration (Ryanair, Wizz Air don’t always show fully), or price prediction.

Verdict: use it for every search, always. This is the baseline.

Hopper

Best for price prediction (despite my complicated feelings)

Hopper’s core feature is the predict button: it tells you whether current prices are “good,” “fair,” or “high” based on historical data, and recommends buying now or waiting. It also sends push notifications when you should buy based on its predictions.

The honesty: the predictions are roughly right about 60-70% of the time based on research and my own informal tracking. That’s better than random chance but not reliable enough to stake a trip on. The app tends to be conservative (it often says “wait”) and sometimes sends frantic buy-now notifications at 2am.

What Hopper does well: the interface is excellent (clean, simple, fast to search), it’s very good at tracking Caribbean and Latin American routes which are some of its strongest data, and the notification system is genuinely useful as a nudge.

The “Price Freeze” feature is interesting: for a small fee, you can lock in a price for 14 days. This has real value if you’re genuinely on the fence about a trip and want to take time to decide without watching the price move.

Verdict: download it and set up tracking for trips you’re planning, but cross-reference with Google Flights before buying.

Skyscanner

Best for open-ended searches and multi-city

Skyscanner’s “Everywhere” destination search is genuinely excellent. Enter your home airport and “Everywhere” in the destination, plus a date or date range, and it returns a ranked list of destinations by price. Filter by region, budget, or category (beach, culture, ski). This is better than Google Flights’ Explore for when you’re in pure “where can I go” mode.

Skyscanner is also the best tool for multi-city planning: building a trip with multiple legs (A to B, B to C, C to home) and comparing prices across the whole journey.

Where it’s weaker: the booking results sometimes include aggregator prices with added fees that aren’t immediately visible. The cheapest results often route you through a third-party booking agent rather than directly to the airline. Always verify what you see on Skyscanner against the airline’s own website before booking.

Verdict: essential for “anywhere” searches and multi-city. Use Google Flights to verify the price before booking.

Kayak

Good backup, some unique features

Kayak has been around long enough to have solid data and a reliable price tracking feature. Its “Hacker Fare” feature (pre-dating Kiwi.com’s branded version) shows opportunities to combine two one-way tickets from different carriers at lower total cost than the official return fare.

Kayak’s “Price Forecast” gives a buy/wait recommendation with reasoning, which is more transparent than Hopper’s colored rabbit.

The app is solid but doesn’t dramatically outperform Google Flights for most searches. It’s worth checking as a second search for routes where you suspect there’s a price gap you’re missing, and for the Hacker Fare feature specifically.

Verdict: a good backup tool for second-opinion searches, especially on complex routing.

Kiwi.com

Best for creative routing and hacker fares

Kiwi specializes in combination tickets: automatically mixing airlines and even transport types (flight + train, for example) to create cheaper routes than booking each leg directly through an airline.

The prices can be genuinely impressive. I’ve found routes through Kiwi that were 30-40% cheaper than any standard search, by routing through a hub that unlocked a differently-priced fare in a different market.

The important caveat: Kiwi is not an airline. When you book combination tickets through them, you’re booking two or more separate fares. If the first flight is delayed and you miss the second, you’re not protected by standard EU261 or US DOT rules the way you would be with a single itinerary. You need to either build in generous connection time or buy their own connection guarantee product.

Verdict: excellent for price-conscious flexible travelers who understand the tradeoffs. Not for time-sensitive travel or anyone who can’t handle the rebooking risk.

Secret Flying and Going (formerly Scott’s Cheap Flights)

Best for mistake fares and exceptional deals

These are email newsletters more than apps, but they serve a distinct purpose: they alert you to mistake fares and heavily discounted sales that would be hard to find through normal searching.

Secret Flying (secretflying.com, also an app) aggregates mistake fares from around the world in near-real-time. These are pricing errors, glitches, or temporary sales. They disappear quickly (sometimes within hours), the airline may cancel them, and you need to book immediately when you see one.

Going (formerly Scott’s Cheap Flights) is a newsletter/app that sends curated deals to your home airport. The free tier sends some deals; the paid subscription sends more. Consistently praised by subscribers for genuine deals rather than manufactured “discounts” off inflated prices.

Both are worth having as background alerts rather than primary search tools.

Verdict: set up notifications and scan them occasionally. You won’t find your planned trip here, but you may find a trip you didn’t plan that’s impossibly cheap.

The actual workflow I use

Google Flights for the initial search: check the calendar view, set price alerts, look at the “Explore” map for inspiration
Skyscanner if the trip is multi-city or I want a “show me cheap” destination browse
Kiwi.com if the price I’ve found seems high and I want to see whether creative routing saves money
Hopper for ongoing tracking and notifications after setting up my target routes
Going/Secret Flying as passive background alerts for exceptional deals

The key: no single app has the best price for every route. The practice of checking 2-3 tools for any significant booking has saved me money repeatedly.

The one thing most people skip

After you find the price you want to book, check it directly on the airline’s website.

The booking platforms include their own fees (sometimes small, sometimes significant). The airline’s own site sometimes offers slightly lower prices or loyalty points for direct bookings. Customer service is easier when you’ve booked directly if something goes wrong. The platform search is for finding and comparing. The airline’s site is often where the actual booking should happen.

That’s the system. Now if you’ll excuse me, the Hopper rabbit is telling me to buy my next flight to Lisbon immediately. It’s probably right. Or wrong. I’ll check Google Flights first.