The best flight data APIs in 2026, compared

If you search for flight data APIs you get a wall of listings with similar names, similar screenshots and wildly different data underneath. This page compares the ones people actually shortlist.

I'll be honest: I'm starting with my own API. I run FlightPowers, so read the first entry as a vendor describing his product. Everything I say about the others is quoted from their own live pages, read on 2026-08-24, with the caveats stated inline, including the finding that is not flattering to me: on raw requests per dollar, one competitor is cheaper than I am at every tier.

1. Google Flights Live API (FlightPowers): mine

Source: Google Flights. Best for: price intelligence (alerts, calendars, "is this a good deal" features).

What I built it around: every result carries Google's own historical price band for the route and dates (price_insights_low / price_insights_high) and Google's verdict on the current fare: low, typical, or high. That is the difference between an API that tells you a price and one that tells you whether the price is good. A fare-alert product can trigger on that field on day one, with no price history of its own. Beyond that: round-trip is a real paired-leg endpoint (one request returns both legs with a combined total, not two one-way searches stapled together), every result ships a working buy_link into Google Flights, per-minute rate limits are published per plan so parallel date scans are a documented capability, and every response carries an X-Search-Status header so "no flights" and "the search failed" are different answers.

Being fair about the cons, because everyone else on this page gets their pros: no multi-city or open-jaw itineraries (one-way and round-trip only), only two cabins documented (Economy and Business), no car rentals, and the top public tier caps at 50,000 requests a month. Current plan prices live on /pricing; the companion Booking.com hotels API is a separate listing on the same account.

2. Air Scraper (sky-scrapper): the cheaper one

Source: Skyscanner. Best for: raw request volume, and scope beyond flights.

The headline finding, stated up front because it is true: Air Scraper is cheaper per request than my API. Prices read off its live RapidAPI listing on 2026-08-24: free tier 20 requests/month, then $9/month for 10,600 requests, $49 for 55,000, $120 for 140,000, which works out to roughly $0.00085–$0.00089 per request at every paid tier, against $0.0010–$0.0040 per request on mine. Its own listing describes it as an API that "helps to query prices for real-time flights, hotels, rental cars, etc… to create a travel website like the skyscanner.com or booking.com."

Two things make a "request" mean different amounts of work, and they are visible in its own documented route list. First, Skyscanner addresses places by internal entity IDs, not IATA codes, so its routes include searchAirport and getNearByAirports: a user typing "New York" generally costs a resolution call before the search call. (Mine takes IATA codes directly.) Second, its route list includes searchIncomplete, searchFlightsComplete and searchFlightsWebComplete alongside searchFlights, naming characteristic of Skyscanner's asynchronous model, where you begin a search and poll for the finished set, and each poll is a request. I have not measured how many calls a typical search resolves in, so I will not put a multiplier on it. But one search is not reliably one request, so measure it on your own workload before choosing on the per-request price. I also searched its listing documentation for price-insight fields equivalent to Google's band and verdict and did not find any (a statement about what the listing documents, not proof no such field exists).

Genuinely fair pros: cheapest per request at every published tier; flights, hotels and rental cars on one key; a price-calendar endpoint and an "everywhere" search as first-class endpoints (on mine you build those by scanning in parallel); multi-stop search, which I do not have at all; and a 140,000-request top tier against my 50,000. Against: rate limits are not published on its listing, and the data is Skyscanner's, which is not interchangeable with Google Flights coverage.

Consider Air Scraper if you need cars, multi-city, or volume past 50,000 requests a month. That list decides it, and this page should not talk you out of it.

3. SerpApi: the platform

Source: Google (many surfaces). Best for: teams that need more of Google than flights.

SerpApi is a general-purpose Google scraping platform where Google Flights is one of several dozen engines on one subscription and one credit pool. From its own pages (retrieved 2026-08-24): plans run $25/month for 1,000 searches up to $275/month for 30,000 (roughly $0.0092–$0.025 per search), and round-trip is a two-request flow (their docs: to get returning flights "you need to make another request using a departure_token"). Credits are fungible across all engines, and only successful searches count toward quota, a genuinely customer-friendly billing policy.

Where it beats me, plainly: its price_insights object includes a price_history array, not just a band; it returns per-itinerary carbon emissions; it supports multi-city and four cabin classes; and it advertises a legal indemnity of up to $2 million for search-engine scraping. The full side-by-side, with everything quoted and dated, is at /compare/serpapi.

Consider SerpApi if flights are one feature of a product that also needs Google Search, Maps or Shopping data; if you want price history without accumulating it; or if your legal team wants the indemnity.

4. Duffel: the one that can actually sell a ticket

Source: airline inventory (NDC and their own IATAs). Best for: products where the purchase happens inside your product.

Duffel is not a data API and comparing it as one is a category error. It is a booking platform: order creation, ancillaries, and access to their IATA accreditation so you do not need your own. Its pricing (from duffel.com/pricing, retrieved 2026-08-24) charges $3.00 per confirmed order and lets search ride along free at a 1500:1 search-to-book ratio, with excess searches at $0.005. For a seller that converts, that model is excellent. For a non-booking workload (no orders means no free searches), every search costs $0.005, and its sign-up flow assumes you are selling flights. The full comparison is at /compare/duffel.

Consider Duffel if you are an OTA, corporate booking tool, agency or marketplace and the transaction happens inside your product. None of the data APIs on this page, mine included, can issue a ticket.

What is not on this list, and why

Several other listings turn up in the same RapidAPI search: flights-sky, google-flights2, booking-com15, sky-scanner3 among them. Their pages did not expose pricing in a form I could read reliably on 2026-08-24, and I am not going to publish a price I did not verify.

Amadeus Self-Service used to be on every shortlist and is no longer a live option. As of 2026-08-24, its portal and pricing pages 301-redirect to the Amadeus homepage, the test sandbox host no longer resolves, all 20 amadeus4dev GitHub repositories are archived, and Amadeus's own developer-guides repository states: "The Amadeus for Developers Self-Service offer has been deprecated." Only the Enterprise portal remains, which generally requires IATA/ARC accreditation. If you are coming from there, the migration mapping is at /compare/amadeus.

How to choose in five minutes

The free tiers make comparison pages, including this one, the wrong way to decide:

1. Subscribe to two free tiers.
2. Run your three hardest routes: the small regional airport, the multi-stop long-haul, the one your users complain about.
3. Count requests per completed search, not requests.
4. Check whether the response has what your feature needs. If your product must say "this is a good price," check for a price band.
5. Then compare cost per completed, usable search.

curl -X POST https://api.flightpowers.com/v1/flights/oneway \
  -H "x-api-key: $FLIGHTPOWERS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from_airport": "JFK",
    "to_airport": "LHR",
    "departure_date": "2026-10-15"
  }'

The full walkthrough of mine is How to get real-time Google Flights data; a key comes from the RapidAPI listing, free tier included (10 requests/month, hard cap: verifies your key, doesn't evaluate).

Related

• FlightPowers vs SerpApi: the full quoted side-by-side
• FlightPowers vs Duffel: data API vs booking platform
• Amadeus Self-Service vs FlightPowers: the migration path
• Price Insights API: the field this whole ranking hinges on, proven with a captured run