What is a GDS? Global distribution systems explained for travel agents

A GDS (global distribution system) is the booking network that connects travel suppliers, such as airlines, hotels and car rental companies, with the agencies that sell them. Travel agencies, travel management companies (TMCs) and online travel agencies (OTAs) use one to search, book and service trips. The big three are Amadeus, Sabre and Travelport.

Here is what a GDS holds, who uses one, how agents get access, and how it compares with NDC and booking direct.

What is a GDS?

A global distribution system is a marketplace for travel content. Travelport likens it to "the ultimate travel matchmaker", connecting travel suppliers (airlines, hotels, car rentals) with travel sellers (agencies, OTAs, TMCs).

Sabre describes the same job in its annual report. Its distribution business brings together inventory, prices and availability from airlines, hotels, car rental brands, rail carriers, cruise lines and tour operators. Then it puts them in front of travel buyers.

Older documents call these systems computer reservations systems (CRSs). The US Department of Transportation noted in 2004 that each of the four systems operating in the US was originally developed by one or more US airlines. Amadeus entered the US market by buying a US system. By then, none of the four systems operating in the US was owned or controlled by a US airline. Amadeus was founded in 1987 by Air France, Iberia, Lufthansa and SAS as an independent and neutral global distribution system.

Who uses a GDS?

Travel sellers of every size. Sabre lists its buyers as online travel agencies, offline travel agencies, travel management companies and corporate travel departments. According to Amadeus's About page, checked October 2026, it had over 180,000 travel agencies and airline sales offices connected by 1998.

What does a GDS hold?

Mostly air, hotel and car, plus more. Travelport lists its content as air, hotel, car, rail, NDC, LCCs, and more, where LCCs are low-cost carriers. Sabre says more than 420 airlines are reachable through one connection. Each booking you make is saved as a passenger name record; see what is a PNR.

How do GDSs make money?

Mostly from suppliers. Sabre earns a fee when a travel agency or corporate travel department books a supplier's product using its GDS, and it is generally paid directly by the travel supplier. It also pays agencies incentive consideration, meaning money paid to agencies for reservations made on its GDS.

How do travel agents get access to a GDS?

Through an agency contract, not a sign-up form. Sabre's agency customers are travel agency subscribers, who pay fees for certain solutions integrated with its GDS. Most of its travel buyer contracts run one to three years, while major travel agency customers typically sign five- to ten-year contracts. Agents then work in the GDS's own tools. Travelport offers Smartpoint Desktop, Smartpoint Cloud, or connecting via APIs.

Developer self-service is shrinking. Amadeus deprecated its Self-Service APIs and archived their guides on July 17, 2026. Its Enterprise APIs remain available, but only on request, with an implementation fee and monthly fees. For the full picture, see travel booking APIs explained.

Booking is not ticketing. Amadeus says IATA or ARC licenses are mandatory to issue flight tickets. A GDS gets you the inventory. Accreditation gets you the ticket. See what IATA codes are.

What this means for independent advisors: most solo advisors will reach a GDS through an agency or host that already holds the contract, not one of their own. Ask your host what GDS access it includes before you pay for anything. For the rest of the setup, see how to start a travel agency.

GDS vs NDC vs direct booking

NDC (New Distribution Capability) is an airline standard, not a rival company. IATA defines it as a data exchange format based on Offer and Order management processes, open to any third party, intermediary, IT provider or non-IATA member. GDSs now carry it too: Travelport lists API content via NDC and modern airline APIs next to classic GDS content.

Direct booking means the supplier's own channel. Sabre names direct distribution by travel suppliers as a competitor, and warns suppliers may keep some fares exclusively for their direct channels, for example the airline's website.

How Tripdash handles bookings

Tripdash Bookings lets you book it all, no IATA code required: flights, hotels, activities, rides and restaurants in one search. See how Tripdash Bookings works. If you are weighing other routes, read how to sell flights without an IATA code and what an OTA is.

Sources

1. Travelport. How Travelport works, checked October 2026.
2. Sabre Corporation. Form 10-K for fiscal year 2025, filed February 18, 2026.
3. Sabre. About Sabre, checked October 2026.
4. Amadeus. About us, checked October 2026.
5. US Department of Transportation. Computer Reservations System (CRS) Regulations, final rule, 69 FR 976, January 7, 2004.
6. IATA. New Distribution Capability (NDC), checked October 2026.
7. Amadeus for Developers. Developer guides repository (deprecated), archived July 17, 2026.
8. Amadeus. Statement regarding Amadeus for Developers portal, 2026.
9. Amadeus for Developers. FAQ, last updated April 20, 2026.