If you have been running a travel agency or building a booking platform for any length of time, you already know that no single GDS has everything.
A multi-GDS travel portal is a booking platform that connects to more than one Global Distribution System simultaneously, pulling live flight inventory, fares, and availability from each source and presenting them to the agent or end user in a single unified search result. Instead of the agent logging into Amadeus for one set of fares, switching to Sabre for another, and checking a third tool for low-cost carriers, the portal does that aggregation work in the background and returns a single comprehensive results page.
The three dominant GDS platforms globally are Amadeus, Sabre, and Travelport. Together, they handle over 97 percent of all GDS-based travel bookings worldwide. Each one has its own strengths, its own airline partnerships, its own regional depth, and its own pricing structure. A travel agency or OTA that connects to only one of them is leaving a meaningful portion of available content off the table. That gap shows up in the fares you can offer, the carriers you can ticket, and the markets you can serve competitively.
Here is a concrete example of the content gap. Amadeus carries over 900 airlines and has the deepest international content, particularly in Europe, Asia-Pacific, the Middle East, and Africa. Sabre connects over 400 airlines with particularly strong depth in North American carriers, corporate fares, and branded fare bundles from US-based airlines. Travelport covers 460 plus airlines and has historically been stronger for rail content, regional European carriers, and certain Asia-Pacific markets where Amadeus has thinner penetration.
If your clients are booking a trip from London to Singapore via New York with a rail leg in Europe, you need content from more than one of those sources to build the most competitive itinerary. A multi-GDS travel portal with proper GDS integration handles that automatically. Your agent sees everything in one search.
Amadeus is the natural starting point for a multi-GDS portal for several reasons. It operates across 190 markets with over 100 offices globally, serving more than 55,000 travel sellers. Its developer ecosystem, which you can explore at amadeus.com/en/airlines/products/all, is among the most mature in the GDS industry, with well-documented REST APIs, a robust sandbox environment, and strong NDC adoption covering 35 airlines across 165 countries. It is currently the only GDS offering NDC products from that breadth of airline partners.
Building Amadeus as the primary GDS layer and then adding Sabre and Travelport as supplementary content sources gives your portal the widest possible inventory foundation with the most robust primary API to build on. Flight Terminus specialises in exactly this architecture through its Amadeus GDS integration service.
Before you decide which GDS sources to include in your multi-GDS portal, you need a clear picture of what each one actually brings to the table. This is not a theoretical comparison. It is the information you need to scope your integration correctly and set the right expectations with your development partner.
Feature | Amadeus | Sabre | Travelport |
|---|---|---|---|
Airlines covered | 900+ airlines, 130+ LCCs | 400+ airlines, strong US depth | 460+ airlines, 150 with ancillaries |
Global markets | 190 countries | 160 countries | 180 countries |
Strongest regions | Europe, Asia-Pacific, Middle East, Africa | North America, Latin America | Eastern Europe, Africa, Asia-Pacific |
NDC support | 35 NDC airlines, 165 countries, strongest NDC depth | NDC certified for airlines and sellers | NDC-enabled retailing on seller side only |
API type | REST APIs, SOAP for legacy, Self-Service and Enterprise | Enterprise-grade REST and SOAP | JSON Air APIs, Travelport+ marketplace |
Hotel content | 500,000+ properties | 300,000+ properties | 3M+ via Booking.com partnership |
Rail content | Limited | Limited | 35 rail operators, including Trainline |
Car rental | Major brands covered | Major brands covered | 42 car rental brands, including Hertz |
Best for | International bookings, OTAs, and modern API builds | US corporate travel, complex itineraries | Regional depth, rail combos, and smaller agencies |
Cost structure | Enterprise pricing, per-transaction fees | Enterprise pricing, higher setup cost | More flexible for mid-sized agencies |
Looking at this table, the case for a multi-GDS approach is clear. No single GDS gives you Amadeus's international airline depth, Sabre's North American corporate content, and Travelport's rail and regional coverage in one connection. A properly built multi-GDS travel portal brings all three content pools into one search layer, so your platform competes on every corridor, not just the ones your primary GDS covers well.
Understanding the technical architecture of a multi-GDS portal helps you make better decisions during the planning and build phase and communicate clearly with your development team. You do not need to write the code, but you do need to understand the layers.
The aggregation layer is the engine behind your portal. It takes search requests from your front-end booking interface and simultaneously fires queries at multiple GDS APIs and any additional content sources you have connected, including NDC channels and direct airline APIs. It collects the responses, deduplicates overlapping content (since the same flight will sometimes appear in both Amadeus and Sabre), normalises the data into a consistent format, and returns a single ranked list of results to the user.
This is significantly more complex to build than a single-GDS integration. The deduplication logic alone requires careful rules to avoid showing the same flight twice at different prices, which confuses customers and erodes trust in your platform. Flight Terminus handles this aggregation layer as part of its travel aggregator portal development service.
Not every search query needs to go to every GDS simultaneously. A smart multi-GDS portal includes routing logic that determines which GDS sources to query based on the route, the origin-destination pair, the airline, and the customer type. A search for flights between Delhi and London will benefit from an Amadeus query as the primary source. A search between Dallas and Chicago will benefit from a Sabre query as the primary. Your routing logic directs traffic intelligently rather than hammering all sources on every single search, which reduces API costs, improves response times, and keeps your GDS usage within contracted limits.
Each GDS returns fare data in its own format and terminology. Branded fares from Amadeus use different field structures than branded fares from Sabre. Ancillary services are described differently across all three systems. The normalisation layer translates everything into a common data schema that your front-end can display consistently, regardless of which GDS the fare originated from. This is what makes the multi-GDS search results look coherent to your agents and customers rather than like a patchwork of mismatched data.
When a customer selects a fare and proceeds to book, the portal needs to send the booking request back to the GDS from which that specific fare came. This means your booking layer must maintain a reference to the source GDS for every fare in a search result and route the booking request correctly. PNR management, ticketing, and post-booking changes all then go through the originating GDS. This layer is where the most integration complexity lives, and where choosing an experienced Amadeus integration partner matters most.
On top of the three GDS sources, a well-built multi-GDS portal also connects to NDC channels for airlines that publish their best fares and ancillaries directly through NDC rather than through the traditional EDIFACT GDS channel. Airlines, including Lufthansa, Air France-KLM, American Airlines, and United Airlines, have shifted significant content to NDC-only distribution. Without an NDC connection, your portal misses those fares entirely.
Amadeus currently leads the GDS industry in NDC adoption, covering 35 NDC airlines across 165 countries and being the only GDS to offer NDC products at that scale. This is another reason Amadeus works well as the primary foundation for a multi-GDS build with NDC layered in. Flight Terminus also offers AQC flight API integration to extend content coverage even further beyond GDS and NDC sources.
Not every travel business needs to connect to all three GDS systems from day one. The right scope depends on your markets, your booking volumes, and the routes your clients book most often. Here is how different business types should think about their multi-GDS strategy.
If you operate a B2C flight booking portal targeting international leisure travelers, you need Amadeus as your core GDS for the depth of airline content it provides across European, Asian, and Middle Eastern routes. Adding Travelport gives you supplementary content for regional carriers and rail combinations in Europe. Adding Sabre gives you access to US airline content if you serve customers booking North American travel. The combination of all three positions your OTA to compete on any international corridor with comprehensive fare coverage.
A custom B2B flight booking solution for corporate travel management needs both Amadeus for international corporate fares and Sabre for North American corporate content including negotiated rates, corporate fare codes, and the branded fare bundles that large US carriers publish most thoroughly through Sabre's corporate channels. If your corporate clients travel globally and within North America, a dual-GDS setup covering Amadeus and Sabre gives you the right content mix.
Travel aggregators who supply inventory to sub-agents, smaller agencies, or white label portal partners need the broadest possible content coverage because their downstream clients are booking across diverse markets and carrier types. A multi-GDS setup connecting Amadeus, Sabre, and Travelport with NDC content on top gives aggregator platforms the inventory depth to serve any downstream booking request without redirecting clients to external sources.
A travel agency focused primarily on South Asian routes, Middle Eastern travel, or Africa might find that a strong Amadeus integration alone covers 90 percent of their booking volume, with Travelport added for specific regional carrier gaps. The right combination for your portal is determined by your actual booking data, not by a generic recommendation. Flight Terminus begins every multi-GDS project with a route analysis to determine which GDS sources genuinely add coverage value for your specific business.
Building a multi-GDS portal is a significant investment. Getting the feature set right from the start means you are not going back and adding critical functionality six months after launch. These are the features that matter most.
The most fundamental feature: one search bar, one set of filters, one results page. The customer or agent should have no visibility into which GDS a fare came from. They should see a clean ranked list of options ordered by price, duration, or whichever criterion they set. The GDS source is a back-end detail that the front-end abstracts away completely.
When the same flight and fare class appears in both Amadeus and Sabre, the portal should display it once at the best available price, not twice. Deduplication logic needs to account for flight number, departure and arrival time, fare class, carrier, and equipment type before deciding two results are the same flight. Getting this wrong creates a messy search experience and confuses customers who see the same flight at different prices from different sources.
Every booking must be confirmed through the GDS from which the fare originally came. The portal needs to track the originating GDS for every fare in every search session and route the booking request correctly. This includes handling PNR creation, ticket issuance, and post-booking modifications through the correct GDS connection without the agent needing to know or care which system is handling it.
NDC fares from airlines like Lufthansa, Air France, American Airlines, and United sit outside the traditional GDS content layer. Your portal should display NDC fares in the same results view as GDS fares, clearly marked where relevant for agent transparency, but presented in the same format and selectable with the same booking flow. The Amadeus NDC integration framework that Flight Terminus uses covers NDC content from the 35 airlines with which Amadeus has NDC partnerships.
Different GDS sources come with different commission structures and cost-per-transaction rates. Your portal's admin layer should let you configure markup rules independently per GDS source, per route, per airline, or per fare class. This means you can apply a different margin on Sabre-sourced North American fares than on Amadeus-sourced international fares, reflecting the different cost and commission structure of each source.
Fares in any GDS can change between the moment a customer selects a fare and the moment they complete the booking. Your portal needs a fare verification step that re-prices the selected itinerary against the originating GDS in real time before confirming the booking and taking payment. This prevents the common problem of a customer paying for a fare that has already changed or sold out.
For agents managing bookings across multiple GDS sources, a consolidated PNR dashboard is not optional. Agents should be able to view all active bookings regardless of which GDS they originated from, access booking details and passenger records, manage changes and cancellations, and track ticket issuance status from one view rather than logging into three separate GDS terminals.
Each GDS returns pricing in the point-of-sale currency, which varies by the GDS configuration and the agent's contracted market. Your portal needs to handle multi-currency display, conversion, and checkout cleanly, with the booking being confirmed in the correct currency for the originating GDS contract. Multi-language support for agent interfaces is also important for portals serving agents across multiple regions.
Building a multi-GDS portal is a more substantial technical project than a single-GDS integration. Here is an honest breakdown of what the development process involves and what the major decisions are at each stage.
Before any development begins, you need active API credentials for each GDS you plan to connect. Amadeus Self-Service APIs are available through the Amadeus for Developers portal and provide sandbox access immediately. Amadeus Enterprise credentials require a formal commercial agreement and are negotiated based on your booking volumes and market. Sabre and Travelport operate similarly: developer sandbox access is available relatively quickly, while production access requires a contracted relationship. Flight Terminus can facilitate introductions to GDS account teams as part of the project scope.
Before writing code, the architecture needs to be designed: which GDS sources the portal connects to, which routes are served by which primary GDS source, how the aggregation and deduplication logic works, and how the booking routing is handled. This stage also covers which NDC channels are included, whether direct airline APIs are required for specific LCC content, and how the caching layer is structured to manage API costs and response times.
The backend development connects to each GDS API, implements the aggregation, normalisation, deduplication, and routing logic, and builds the booking and ticketing flow. For a multi-GDS portal, this is the most complex and time-consuming development phase. Amadeus REST APIs are the most developer-friendly of the three major GDS systems to work with, which is another practical advantage of using Amadeus as the primary integration layer. Sabre and Travelport both use more complex XML and SOAP-based protocols for their core booking functions.
The front-end search interface, results display, booking flow, payment integration, and agent management tools are built on top of the backend layer. For agencies wanting a B2C portal, Flight Terminus's B2C flight booking portal framework provides a production-tested front-end foundation that significantly reduces the front-end build timeline. For B2B portals serving travel agents, the custom B2B flight booking solution framework handles agent login, markup configuration, and PNR management out of the box.
Every GDS provides a sandbox environment for testing before production access. Multi-GDS testing is more complex than single-GDS testing because you are testing the interaction between multiple API sources, not just one. The deduplication logic, routing rules, and fare normalisation all need to be validated with real data from each GDS sandbox before any production credentials are used. Expect a thorough QA phase covering all major booking flows, edge cases, and error scenarios across each GDS source.
After sandbox testing, the portal moves to production with live GDS credentials. The first weeks in production require careful monitoring of API response times, error rates, and deduplication accuracy across real bookings. API cost monitoring is also important from day one, as multi-GDS search volumes can generate significant per-transaction costs that need to be managed against the routing and caching logic configured during development.
Flight Terminus is a travel technology development firm specialising in GDS integrations, custom booking portals, and API-based travel platforms. Our multi-GDS portal development service covers the complete build from architecture design through to production launch and ongoing maintenance.
Every project starts with a discovery call to understand your booking volumes, your target markets, the routes your clients book most often, and your existing technology setup. From there, we design the right multi-GDS architecture for your specific business rather than applying a generic template. To start that conversation, visit flightterminus.com/contact-us.
Frequently Asked Questions about Multi-GDS Portal Development
Yes, but the cost difference is not as large as many agencies expect when they first hear the term. The highest additional cost in a multi-GDS build is the aggregation and deduplication logic, which sits in the backend layer. The front-end, payment integration, and admin tools are largely the same regardless of how many GDS sources feed into the platform. GDS contract costs also increase, since you are paying transaction fees to multiple providers rather than one. Against that, the incremental revenue from broader content coverage typically outweighs the additional cost within 6 to 12 months for agencies with meaningful booking volumes.
Your IATA accreditation covers ticket issuance authority regardless of which GDS you use to source the fare. What changes with each GDS is the commercial agreement you hold with that specific GDS provider, which governs pricing, booking fees, and the content access you are entitled to. Flight Terminus can guide you through the commercial requirements for each GDS as part of the project planning phase.
Yes, and this is actually the most sensible approach for many agencies. Building a strong Amadeus foundation first, with a well-structured aggregation layer that is designed to accept additional content sources, means you can add Sabre, Travelport, or direct NDC connections without rebuilding the core architecture. The key is making sure the initial build is architected for extensibility from the start. If you bolt on additional GDS sources to a system that was not designed for it, the integration complexity compounds significantly. Flight Terminus designs all multi-GDS backends with extensibility as a core requirement, not an afterthought.
A multi-GDS portal specifically connects to two or more Global Distribution Systems as its primary content sources. A travel aggregator portal is a broader concept that may include GDS sources but also brings in direct airline APIs, LCC content, NDC channels, hotel bed banks, and other content types that sit outside the GDS ecosystem entirely. A full travel aggregator is the superset of a multi-GDS portal. Many travel businesses start with a multi-GDS build and progressively add non-GDS content sources as their platform matures.
For most travel businesses targeting international markets, the combination of Amadeus, Sabre, and Travelport covers the broadest possible airline content. Amadeus leads in European, Asian, Middle Eastern, and African carrier content with the strongest NDC adoption. Sabre provides depth in North American carriers and corporate fare structures. Travelport adds regional airline content, rail connections through its Trainline partnership, and coverage in markets where the other two have thinner penetration. Adding NDC channels on top of this three-GDS base, particularly through Amadeus's NDC program, fills the remaining content gaps from airlines distributing their best fares directly.
Yes. All three major GDS platforms include hotel, car rental, and ancillary content alongside flight inventory. Amadeus covers 500,000-plus hotel properties. Sabre covers over 300,000 properties. Travelport accesses over 3 million accommodation options through its Booking.com partnership. A multi-GDS portal can aggregate hotel content from these same GDS sources alongside flight content, giving customers a combined flight and hotel search experience in one platform. Car rental, rail, and cruise content can also be included, depending on which GDS sources are connected and what your platform's scope covers.