New Distribution Capability: How NDC Is Transforming Airline Retailing

What Is NDC: The Standard Explained

New Distribution Capability, universally abbreviated as NDC, is an XML-based data communication standard published by the International Air Transport Association (IATA) under Standard IS-20184. First introduced in 2012 and progressively updated through NDC 17.2, 18.1, and 21.3 versions, NDC defines how airlines communicate their product offers — flights, fares, ancillary services, personalized pricing — to third parties including travel agencies, online booking tools, and corporate travel management systems. It is not a booking system or a technology product; it is a protocol specification that any technology provider can implement.

To understand why NDC was created, it is essential to understand what it replaces. The existing GDS-based distribution architecture uses EDIFACT — a data exchange standard designed in the 1970s for electronic commerce — as its communication protocol. EDIFACT messages are highly structured and limited in information density. A standard availability request and response through EDIFACT can communicate flight times, fare classes, and a price, but it cannot easily communicate what is included in that price, what optional add-ons are available, which seat is being offered, or what a specific customer's personalized fare is based on their loyalty status. The data model reflects the product that airlines sold in the 1970s — a seat from A to B in economy, business, or first class — not the complex bundled-and-unbundled product airlines sell today.

NDC uses XML rather than EDIFACT, which provides a fundamentally richer data model. An NDC offer response can include structured descriptions of what is included in the fare (carry-on baggage, checked baggage, seat selection, lounge access, meals), high-resolution images of seat products, personalized pricing that differs between a loyalty member and a non-member for the same flight, and dynamic bundles that combine base fare with ancillary services at a package price. This richness enables airlines to present their product as a retailer would — with full product information, visual imagery, and upsell opportunities — rather than as a row in a price table.

The NDC standard is organized around an API workflow that mirrors a retail transaction. The process begins with an AirShopping request — the equivalent of searching for products — which returns a set of Offers from the airline. An Offer is a priced bundle of flight segments and ancillary services valid for a defined period, with a unique OfferID. The traveler or agent selects an Offer and proceeds to OrderCreate, which creates an Order — IATA's replacement for the PNR and ticket, a single unified record of the passenger's entitlement. Payment is processed through the API, and the Order is confirmed. Subsequent modifications are handled through OrderChange and OrderCancel requests. This workflow is conceptually analogous to an e-commerce checkout flow, deliberately designed to mirror the UX patterns of modern digital retail.

IATA has established an NDC certification program that validates technology implementations against the standard. Airline NDC implementations are certified at three levels — Level 1 (shopping), Level 2 (shopping and order creation), and Level 3 (full order management including changes and cancellations) — reflecting the progressive complexity of implementing the full specification. As of 2024, approximately 80 airlines have achieved Level 3 NDC certification, with American Airlines, Lufthansa, British Airways, Air France-KLM, and Singapore Airlines among the most advanced implementers.

Why Airlines Want NDC: Revenue, Control, and Cost

Airlines' enthusiasm for NDC is driven by three distinct commercial motivations that reinforce each other: the ability to sell richer products with higher ancillary revenue, the ability to present personalized offers based on customer data, and the potential to reduce GDS distribution costs by creating direct API connections that bypass the GDS segment fee.

The ancillary revenue argument is the most immediately commercially tangible. Airlines now generate substantial revenue — for some low-cost carriers, more than 50% of total revenue — from ancillary products: checked baggage, seat selection, priority boarding, lounge access, travel insurance, hotel and car rental commissions. In the legacy GDS architecture, most of these ancillary products are invisible or poorly represented in the booking flow: a travel agent booking in GDS sees a fare and a flight, but cannot easily present the passenger with a bundled offer including preferred seat, checked bag, and airport lounge access at a combined price. NDC makes all of these products addressable in a single structured API response, enabling the full ancillary catalog to be presented and purchased at the time of booking rather than added piecemeal at check-in or at the gate.

The personalization argument is more strategically significant over the long term. The GDS architecture treats all passengers identically — a J-class fare is a J-class fare regardless of whether it is being purchased by a first-time traveler or the airline's most valuable lifetime customer. NDC allows airlines to identify the customer (through loyalty program membership recognition in the shopping request) and return personalized offers: a loyalty member approaching Gold status might be offered an upgrade opportunity; a business traveler with a corporate account might see a negotiated rate with specific inclusions. This personalized offer capability mirrors what Amazon, Netflix, and other digital retailers have done — using customer data to differentiate the purchase experience and increase conversion and revenue per customer.

The distribution cost argument has generated the most controversy. GDS segment fees of $3–8 per booking represent a significant cost for airlines with millions of annual GDS-originated bookings. NDC enables airlines to create direct API connections with travel agencies, online booking tools, and corporate booking systems without GDS intermediation, potentially eliminating or dramatically reducing the segment fee. However, the transition from GDS to direct NDC connection is not cost-free: airlines must invest in NDC API infrastructure, support integration work by dozens or hundreds of connected parties, and manage multiple direct connections that the GDS previously consolidated. Whether NDC reduces net distribution costs depends heavily on adoption rates and the commercial terms negotiated for direct connections.

American Airlines' controversial NDC strategy between 2021 and 2023 illustrated the tension between the distribution cost motivation and the need to maintain commercial relationships with agencies and corporate customers. American withdrew full GDS content (including fare classes that could be booked at competitive prices) from Sabre and Travelport unless agencies connected via NDC or agreed to direct connect agreements. The move generated immediate revenue loss as some agencies booked competitors rather than upgrade their technology, and prompted a partial reversal in 2023 when American restored full GDS content while maintaining NDC incentives. The episode demonstrated that airlines cannot unilaterally dictate distribution channel migration — customer and agent behavior must be managed as carefully as technology implementation.

Adoption Status: Where NDC Stands in 2024

NDC adoption has progressed significantly but unevenly across the industry since IATA's push for airline adoption beginning around 2018. The 2024 landscape reflects genuine commercial deployment at major carriers alongside continued reliance on legacy GDS distribution at smaller carriers and in markets where the technical infrastructure for NDC implementation has not yet developed.

Among the most advanced NDC adopters, Lufthansa Group (Lufthansa, Swiss, Austrian, Brussels Airlines) has deployed NDC across its full network and has been the most aggressive in incentivizing direct NDC connections with agencies, offering NDC-exclusive fares and content that are not available through legacy GDS channels. British Airways and Iberia (both IAG group airlines) have achieved comprehensive NDC Level 3 certification and have progressively shifted corporate account content toward NDC channels. Air France-KLM's NDC implementation covers the full product catalog including La Première first class on Air France, enabling the display of detailed cabin imagery and personalized upgrade offers through NDC-connected agencies.

Low-cost carriers have largely bypassed the NDC debate because they were never deeply integrated into GDS distribution to begin with. Ryanair, easyJet, Wizz Air, and Southwest sell almost entirely through direct channels (websites, apps, and selected metasearch connections); their distribution architecture is already effectively "NDC-like" in that they control the full customer relationship without GDS intermediation. Where low-cost carriers do connect to distribution channels, they use direct APIs that predate NDC but achieve similar functional outcomes.

The Asia-Pacific market has been slower to adopt NDC than North America and Europe, partly because the large travel agency communities in markets like Japan, South Korea, and China are highly dependent on legacy GDS workflows and the investment required to migrate to NDC-capable booking tools is substantial. Cathay Pacific, Singapore Airlines, and Japan Airlines have all achieved NDC certification but have deployed NDC capabilities selectively rather than replacing legacy GDS content wholesale.

On the technology aggregation side, all three major GDS operators have built NDC capabilities into their platforms, positioning themselves as aggregators of both traditional EDIFACT content and NDC content. Travelport's "Travelport+" claims the most comprehensive NDC implementation. NDC aggregators — technology vendors who build NDC connections to multiple airlines and then expose a normalized API to travel agencies and booking tools — have also emerged as a significant category, with companies including Duffel, Verteil, and TRVL building NDC aggregation platforms that give agencies a single integration point to access NDC content across multiple airlines.

Travel Agent Impact: Winners, Losers, and Adaptation

The travel agency community's response to NDC has ranged from proactive adaptation to active resistance, depending on the agency's technology capabilities, client base, and competitive position. The fundamental challenge for travel agents is that NDC requires investment: agencies must either upgrade their GDS booking tools to NDC-capable versions, build direct NDC connections to airlines, or work with NDC aggregators — all of which involve cost, technical complexity, and workflow disruption.

Large online travel agencies (OTAs) — Expedia, Booking.com, Trip.com — have the technology resources to implement NDC connections and have done so for major airlines. Their NDC implementations allow them to display carrier-branded cabin imagery, ancillary bundles, and occasionally personalized pricing in ways that improve conversion rates and revenue per booking. For OTAs, NDC is primarily an opportunity to improve the customer experience and increase ancillary attach rates, and they have been willing investors in NDC technology accordingly.

Corporate travel management companies (TMCs) — American Express Global Business Travel (Amex GBT), BCD Travel, CWT — have had a more complicated relationship with NDC. Corporate booking tools (Concur, Cytric, Egencia) that corporate travelers use to book trips according to company travel policies were not initially NDC-capable, creating a situation where NDC-exclusive content was invisible to corporate travelers. This was commercially damaging for airlines seeking to grow corporate business through NDC, and it motivated significant TMC and booking tool investment in NDC integration. Amex GBT's 2023 NDC implementation announcement, which brought NDC content from multiple carriers into its Neo booking platform, was a signal that the corporate travel segment had reached NDC readiness.

Traditional brick-and-mortar travel agencies and mid-size online agencies face the greatest adaptation challenge. Many operate with GDS-provided booking desktops that are now NDC-capable through vendor upgrades (Amadeus Selling Platform Connect, Sabre Red 360 with NDC content), reducing the need for bespoke integration work. But the commercial model shift — toward direct airline relationships and potentially reduced GDS incentive payments — requires agencies to reconsider their business model. Some smaller agencies are choosing to work exclusively through NDC aggregators rather than directly connecting to airlines; others are partnering with larger TMCs to access NDC content under their technology umbrella.

NDC's Future: ONE Order and the Offer-Order World

IATA's NDC roadmap extends beyond the current offer and order transaction standard to a broader architectural vision called ONE Order. ONE Order proposes replacing the multiple existing record types — the PNR, the e-ticket, the Electronic Miscellaneous Document (EMD) — with a single unified Order record that contains all passenger entitlements, modifications, and ancillary purchases in one place. This simplification is more than technical housekeeping: it enables the kind of continuous retailing that airlines aspire to, where the passenger's entitlement record is updated dynamically as they make changes, purchase upgrades, or are proactively offered personalized deals throughout their journey.

The interline complexity of ONE Order — ensuring that a single Order record can represent a codeshare or interline itinerary where multiple airlines are responsible for different segments, each with their own ancillary products and service standards — is the most significant technical challenge. IATA is developing interline settlement standards for the ONE Order world that would replace the current Billing and Settlement Plan (BSP) and Interline Billing Agreement (IBA) infrastructure, which was designed around paper tickets and periodic financial settlement rather than real-time Order management.

Looking further ahead, the convergence of NDC with artificial intelligence creates possibilities for truly dynamic, personalized airline retailing. An AI-driven offer engine connected to a customer's full travel and purchasing history, loyalty status, and current trip context could generate bespoke offers — a specific upgrade, a lounge pass for the connection, a hotel at the destination with a discount negotiated by the airline — at exactly the moment when the customer is most likely to purchase. This vision is technically feasible with NDC's API framework in ways that EDIFACT cannot support, and it represents the long-term commercial justification for the industry's NDC investment.

The timeline to industry-wide NDC deployment is long: legacy GDS EDIFACT content will coexist with NDC content for at least a decade, and some market segments (domestic markets in certain countries, charter and group bookings, some interline itineraries) may never fully migrate to NDC. However, the trajectory is clear, and carriers, agencies, and technology vendors that build NDC competency now will be better positioned for the distribution landscape of the late 2020s than those that delay.