Behind every travel booking website are APIs from travel providers: the systems that supply flights, hotels, buses, cars and activities in real time. Understanding the types of travel APIs, and what each provider offers, helps you choose the right sources for your business. This article gives an overview.
Flight APIs
Global distribution systems (GDS)
Amadeus, Sabre and Travelport connect to hundreds of airlines. They provide availability, fares, booking, ticketing and after-sales functions. Access usually requires an agreement and, for ticketing, accreditation or a ticketing partner.
Airline NDC APIs
Direct connections with individual airlines, offering richer fare bundles and ancillaries. Each airline is a separate integration, though aggregators and GDSs also distribute NDC content.
Low-cost carrier APIs
Budget airlines often sell through their own APIs or through aggregators.
Flight aggregators and consolidators
Providers that combine GDS, NDC and low-cost content behind one API and may handle ticketing for you.
Hotel APIs
- Bedbanks and wholesalers supply net rates for large numbers of hotels.
- Hotel chains and direct connects offer rates from specific brands.
- Channel managers can connect individual hotels.
Ground transport APIs
- Bus APIs from aggregators and operator platforms, with seat layouts and boarding points.
- Car rental APIs for self-drive rentals.
- Transfer APIs for airport and point-to-point transfers.
Activities and other APIs
- Tours, attractions and experiences.
- Rail in some markets.
- Travel insurance and visa services.
Supporting APIs
- Payment gateways for collecting money.
- Maps and geolocation.
- Currency exchange rates.
- Messaging services for SMS and WhatsApp notifications.
What to compare between providers
- Coverage in your key destinations and routes.
- Price competitiveness and commercial model.
- Booking reliability and response speed.
- After-sales support and documentation quality.
- Payment terms, deposits and credit.
In practice: choosing a first set of APIs
A new OTA focused on Indian domestic travel chose a flight aggregator with good low-cost carrier coverage, one hotel bedbank strong in Indian cities and a bus aggregator. Together they covered most of its customers' needs with three integrations. It added a GDS and a second hotel supplier later, when data showed where coverage was weak.
Common mistakes
- Choosing a provider before checking coverage in your key destinations.
- Ignoring commercial terms such as search limits and deposits.
- Connecting many providers before the first one works well.
Direct supplier or aggregator?
Direct connections to GDSs, airlines or hotel chains can offer better rates and control but need agreements and more integration work. Aggregators provide broad content through one API and faster onboarding. Many businesses start with aggregators and add direct connections where volumes justify them.
Frequently asked questions
How many API providers does a travel website need?
Enough to cover your customers' main needs well. Many start with one provider per product and add more over time.
Are travel APIs free?
Access may be free, but providers earn through rates, fees or commissions. Understand the full commercial model.
Building a supplier roadmap
Write down which products and destinations matter most this year and next, then map each to a supplier type. Start with the sources that cover most of your bookings, measure gaps in coverage and price, and add suppliers where the data shows clear benefits. A roadmap prevents ad hoc integrations that add cost without adding sales.
Key takeaways
- Travel APIs cover flights, hotels, ground transport, activities and support services.
- Providers range from GDSs and airlines to aggregators and bedbanks.
- Choose by coverage, price, reliability and support in your market.
Compare suppliers on our travel API providers page.
