IATA & NDC
IATA vs NDC: Understanding Modern Airline Distribution
What IATA does, what NDC changes, and why both matter for travel agencies and OTA developers
By Project OTA | 8 Aug, 2026 | 7 min read
IATA governs airline accreditation, BSP and industry standards. NDC is a messaging standard that enables richer airline content distribution. Understanding both is essential for modern travel technology.
What IATA is and what it governs
IATA — the International Air Transport Association — is the trade body representing the airline industry. For travel agencies, the most significant IATA function is accreditation: an IATA-accredited agency can issue airline tickets through the Billing and Settlement Plan (BSP), has direct commercial relationships with airlines and is recognised globally as a trusted ticketing entity.
IATA also sets industry standards, manages financial settlement processes, oversees safety data reporting and produces the travel industry's reference data — airport codes, airline codes, fare construction rules, interline agreements and dangerous goods regulations. When a GDS creates a PNR or issues a ticket, the rules and data structures it follows are largely IATA-defined.
What NDC is and what it changes
NDC — New Distribution Capability — is an XML-based messaging standard published by IATA that enables airlines to distribute rich content directly to travel agents, OTAs and technology intermediaries without routing everything through a GDS. Where traditional GDS messages are limited to fare codes, cabin classes and basic ancillaries, NDC allows airlines to send personalised offers, bundled fare families, seat selections, dynamic pricing and real-time availability.
NDC does not replace the GDS. Instead, it creates a parallel or complementary distribution channel. An airline can publish its full catalogue of offers through NDC — dynamic bundles, exclusive fares, upsells — while legacy GDS content remains available for interline and multi-carrier itineraries that NDC alone cannot efficiently handle.
How IATA and NDC work together
IATA created NDC as a standard, so the two are not competing — they are complementary. An IATA-accredited agency can use NDC connections to access airline-direct content, issue tickets through BSP, apply IATA-defined fare construction rules and settle payments through the same financial infrastructure they already use for GDS bookings.
For OTA developers, this means a booking engine should ideally support both GDS content and NDC content. The GDS provides broad multi-airline availability, interline ticketing and legacy fare content. NDC provides richer, more current offers directly from airlines — especially useful for carriers that have reduced their GDS participation.
What this means for agencies and developers
Agencies that rely only on GDS may miss exclusive fares and ancillaries that airlines publish through NDC. Agencies that adopt NDC get richer content but must manage separate API connections, credential sets and booking flows for each airline's NDC implementation — since each airline's NDC API can differ significantly despite sharing the IATA standard.
OTA developers building booking engines should plan a supplier-agnostic architecture: a normalisation layer that handles GDS EDIFACT or REST, NDC XML, LCC APIs and consolidator feeds — presenting agents and customers with consistent search results while managing booking and servicing through the correct channel.
Frequently Asked Questions
Do I need separate accreditation to use NDC?
NDC does not have its own accreditation body. Airlines approve technology partners and agencies to access their NDC APIs individually. IATA manages a registry of NDC-capable technology providers.
Will NDC replace GDS?
Unlikely in the near term. GDS remains essential for multi-airline itineraries, interline ticketing and agency workflows. NDC is growing as a complementary channel, especially for direct airline content and dynamic offers.
Can one booking engine use both GDS and NDC?
Yes. A well-designed booking engine normalises GDS, NDC, LCC and consolidator content into a single search and booking interface while routing transactions through the correct fulfilment channel.
Key Takeaways
- IATA is an industry body that governs accreditation, BSP settlement and standards.
- NDC (New Distribution Capability) is a messaging standard enabling richer airline offers.
- Both work together — NDC uses IATA-standardised XML schemas for airline-direct content.
Project OTA builds booking engines that support GDS, NDC and LCC connectivity — giving agencies and OTAs comprehensive airline content from a single platform.
Talk to Project OTA