Where your flight content comes from shapes almost everything else about your business: the fares you can offer, the ancillaries you can sell, the margin you keep and the complexity your back office has to manage. Three channels dominate the conversation, and they are often discussed as rivals when in practice most sellers use a blend. This is a plain explanation of the Global Distribution System, direct airline APIs and New Distribution Capability, what each is good at, and how to think about combining them.
The GDS: the established backbone
A Global Distribution System, such as Amadeus, Sabre or Travelport, is an aggregator that has connected airlines and agents for decades. Its great strength is breadth and standardisation: a single connection gives you access to a vast range of airlines, in a consistent format, with mature tooling for booking, ticketing and servicing. The PNR, the booking record at the heart of the workflow, and the settlement processes around it are all built on this infrastructure. For an agency that needs wide coverage and reliable servicing, the GDS remains the backbone.
The trade-offs are equally well known. GDS access carries cost, and the content can be limited to what the airline chooses to file there, which may exclude certain web fares, bundles and ancillaries. Rich product differentiation, the things airlines increasingly want to sell beyond a seat, has historically been awkward to express through traditional GDS formats.
Direct APIs: control at the cost of effort
A direct connection to an airline's own API gives you access to that carrier's content on its terms: its full fare range, its ancillaries, its bundles, often including fares not filed to the GDS. For a high-volume relationship with a particular airline, this can mean better pricing and richer product than any intermediary offers.
The cost is integration effort and fragmentation. Every direct API is a separate connection to build, test and maintain, each with its own quirks. Servicing, changes and refunds may follow the airline's own rules rather than a common standard, and your back office now has to handle several different shapes of booking. Direct APIs reward focus: a handful of strategic carriers where the volume justifies the work, rather than a long tail of one-off connections.
NDC: the airline's richer shop window
New Distribution Capability is an industry data standard, developed under IATA, that lets airlines distribute richer, more dynamic content through a common XML-based messaging format. The intent is to combine the breadth advantage of standardisation with the richness advantage of direct connections: dynamic pricing, bundled offers, ancillaries and personalised content, delivered in a way that aggregators and agents can consume consistently.
NDC is best understood as the direction of travel for distribution rather than a finished, uniform reality. Adoption varies by airline, implementations differ in maturity, and servicing an NDC order can behave differently from a traditional booking. The promise is real and increasingly important, but it is arriving unevenly, which means sellers have to manage a mix of NDC and traditional content for some time yet.
How the three compare
It helps to hold the trade-offs side by side rather than judging any channel in isolation.
- Breadth. The GDS leads on coverage; direct APIs are narrow by design; NDC aims for breadth through a shared standard but depends on airline adoption.
- Content richness. Direct APIs and NDC expose ancillaries and dynamic offers that traditional GDS formats often cannot; the GDS gives consistency over richness.
- Cost. GDS access carries fees; direct APIs trade fees for integration effort; NDC sits between, with cost shaped by how you connect to it.
- Servicing complexity. The GDS offers mature, standardised servicing; direct APIs and NDC orders can each follow their own rules, adding operational complexity.
Most sellers will run a blend
The honest conclusion is that these are not mutually exclusive, and treating the choice as all-or-nothing leads to worse outcomes. A sensible strategy usually keeps the GDS as the broad backbone for coverage and servicing, adds direct APIs for a small number of strategic, high-volume carriers, and adopts NDC content where airlines offer it and the richer product justifies the added complexity. The right blend depends on your route mix, your volumes and how much integration effort you can sustain.
The operational catch nobody mentions
Sourcing content from multiple channels solves a commercial problem and creates an operational one. A booking from the GDS, an order from an NDC connection and a reservation from a direct API can look quite different, settle differently and service differently. If each lands in a separate system, your team has to learn three workflows and reconcile across all of them, and the margin you gained from richer content gets eaten by the cost of managing it.
This is the quiet argument for a unified platform underneath your distribution strategy. The point of a Travel ERP such as Flightna is not to choose your channels for you but to normalise what comes back from them, so a GDS PNR, an NDC order and a direct-API booking all become one consistent record that your back office, your finance team and your reporting treat the same way. Choose your content sources for commercial reasons; just make sure the operation underneath can absorb the variety without passing the complexity on to your staff.