Key Takeaways
- Hotel APIs mostly come from bed banks and wholesalers; flight APIs from GDSs, NDC airlines, aggregators and low-cost carriers.
- Test access is often easy to get; production access usually needs a commercial agreement, credit terms and, for flights, a ticketing route.
- The hard part is not the first API — it is the third, when you have to normalise data and map duplicate hotels.
- A unified API trades some control for much faster integration.
A hotel or flight API lets your software search, price and book a supplier’s inventory directly. Hotel APIs usually come from bed banks and wholesalers; flight APIs from GDSs, airlines’ NDC connections, aggregators and low-cost carriers. Production access normally requires a commercial agreement, and for flights a ticketing arrangement.
What a travel API is
A travel API is a programmatic connection to a supplier. Instead of an agent searching a supplier’s website, your booking engine sends the search to the supplier’s system and receives availability and prices back in seconds.
Availability and prices for a destination, dates and occupancy.
Confirm the price and cancellation policy are still valid before booking.
Create the reservation and receive the supplier’s reference.
Retrieve, amend and cancel the booking afterwards.
Types of hotel API provider
| Provider type | What you get | Typical access |
|---|---|---|
| Global bed banks | Hundreds of thousands of hotels at net rates | Commercial agreement, credit or deposit |
| Regional wholesalers | Strong coverage and rates in specific destinations | Agreement; often relationship-led |
| OTA affiliate APIs | Large inventory, commission-based | Affiliate approval; retail rather than net rates |
| Direct hotel connections | Best rates for contracted hotels | Your own contracts, often via a channel manager |
Because each supplier lists the same hotels differently, connecting several of them creates duplicates — the problem hotel mapping solves.
Types of flight API provider
| Provider type | What you get | Typical access |
|---|---|---|
| GDS (Amadeus, Sabre, Travelport) | Most full-service airlines through one connection | GDS agreement; ticketing needs accreditation or a partner |
| Airline NDC | An airline’s own offers and bundles | Per airline or via an aggregator |
| Flight aggregators | GDS, NDC and LCC content combined | Commercial agreement |
| Low-cost carrier APIs | LCC fares not always in the GDS | Per airline or via an aggregator |
See GDS vs NDC for how the two flight channels differ.
How to get a flight or hotel booking API
- Decide your model — are you selling to travellers (B2C) or to agents (B2B)? Suppliers ask.
- Apply for test access — most suppliers provide a sandbox and documentation.
- Agree commercial terms — rates, credit or deposit, and settlement.
- Arrange ticketing for flights — IATA accreditation, or a consolidator or partner that issues for you.
- Certify — many suppliers review your integration before switching on live bookings.
About "free" APIs: test environments are often free; live booking access is a commercial relationship. A free API that returns real bookable prices without an agreement is rare.
What integration really costs
The first API is the easy one. Costs climb with each additional supplier because you must normalise different data models, map hotels and rooms across suppliers, handle each supplier’s errors and rate limits, and keep up with their version changes. That ongoing maintenance is the cost most often missing from budgets.
Unified API or direct integrations?
A unified API puts many suppliers behind one endpoint and one data model. You integrate once; the provider maintains the connections and the mapping. Direct integrations give you full control and no intermediary, at the cost of building and maintaining each one. Many businesses combine the two: a unified API for breadth, direct connections for their most important suppliers.
TraveleXe’s APINex is a unified travel API: one endpoint reaching 2M+ hotels, sightseeing and transfers, responses normalised across suppliers, room data cleaned by the Syncro mapping core — and you can bring your own supplier credentials and contracts.