# Flight Booking API: Search, Book and Manage | OnArrival > Integrate flight search, booking, bags, seats, changes and refunds across NDC, GDS and direct airline content with OnArrival. Source: https://www.onarrival.com/flights --- # Search, book and manage flights through one API. Bring airline content into one integration: airlines’ own booking feeds (NDC), the big shared booking networks (GDS) and low-cost airlines. Sell fares with the bags and seats people actually want. When plans move, handle supported changes and refunds through the same API. [Request a key](https://www.onarrival.com/signup) [Read the docs](https://docs.onarrival.com/) airlines — NDC, GDS and low-cost 517+ low-cost airlines, connected directly 140+ median search time, from cache 290ms In short ## Flights, in four steps. One connection gives your app fares from hundreds of airlines, and the tools to look after each booking once it is made. 1. Search One search covers full-service and low-cost airlines. 2. Choose Travellers compare fares with bags and seats shown up front. 3. Book Pay and issue the ticket under the setup agreed for your launch. 4. Look after Handle supported changes, refunds and disruption alerts through the same API. Inventory ## Three airline sources. One API. Each source works differently. You get one offer format, and every offer still shows what its airline allows. NDC ### Airlines’ own feeds (NDC) NDC is the airline industry’s newer standard for selling fares and extras directly. We maintain each airline connection and its version changes. Every offer shows the actions its airline supports. Carrier-specific capabilities GDS ### Booking networks (GDS) Sabre, Amadeus and Travelport, for the long tail of older airline connections and tickets across partner airlines. Search uses cached availability. Fare rules decide when the price must be checked again. Sub-second cache LCC ### Low-cost airlines, direct Connect low-cost airlines directly for fares, bags, seats and bundles. What you can sell and change depends on each airline connection. 140+ operator-direct SELL ### Our ticketing authority Sell under the ticketing setup agreed for your launch, or bring your own airline contracts and accreditation. During onboarding we confirm who issues tickets, in which markets, and who is responsible for what. Ticketing scoped at onboarding How it works ## How airline offers reach your app. Search returns ranked offers with fare, taxes, bags and seats already in one object. Book with the offer ID and a payment token. The shape is the same whichever source answered. Offer validity and any required price check depend on the booking flow. [Read the reference](https://docs.onarrival.com/) How it normalises NDC Singapore Airlines "branded_fare":"SQ_FLEX" GDS British Airways BKG/BA-176/M/Y LCC Ryanair "fareCode":"R-VALUE" OfferObject carrier"SQ"|"BA"|"FR" fare"flex" total480 USD ancillaries[…] conditions{…} In depth ## The hard parts, already handled. Compare fares and extras, then manage supported changes, cancellations and refunds after booking. 01 ### Branded fares & extras Fare types such as Basic or Flex, plus bags, seats, meals, lounge access and priority boarding. Shown the way each airline intends, and comparable across airlines. Shop 02 ### Virtual interlining Combine flights from airlines that have no agreement to ticket together. Where available, the itinerary shows connection protection, baggage handling and recovery options. Supply 03 ### Your negotiated fares Show your corporate or agency fares in the same search as public ones. Eligibility, fare rules and ticketing references stay attached, so travellers only see fares they can book. Supply 04 ### Full order management Request supported changes, refunds and exchanges through the booking API. Cases that need airline approval or manual work go to the agreed support team, with the booking history attached. Service 05 ### Seat maps in one format Show cabin layouts and per-seat prices where the airline provides them, in one format across all your sources. Shop 06 ### Disruption pipeline Schedule changes and disruptions, such as cancellations and delays, trigger a webhook (an automatic message to your system) with ranked rebooking options attached. Set an auto-rebook policy and most disruptions resolve themselves. Service @media (prefers-reduced-motion: no-preference){ .oa-illo-in .pdf-branch{stroke-dasharray:120; stroke-dashoffset:120; animation:pdfDraw 1s ease-out forwards;} .pdf-branch-2{animation-delay:.12s} .pdf-branch-3{animation-delay:.24s} .oa-illo-in .pdf-src{opacity:0; animation:pdfFade .5s ease-out forwards;} .pdf-src-2{animation-delay:.1s} .pdf-src-3{animation-delay:.2s} .oa-illo-in .pdf-node{opacity:0; transform-box:fill-box; animation:pdfRise .6s .55s ease-out forwards;} .oa-illo-in .pdf-field{opacity:0; animation:pdfTick .4s ease-out forwards;} .oa-illo-in .pdf-stamp{opacity:0; transform-box:fill-box; transform-origin:center; animation:pdfStamp .5s 1.6s cubic-bezier(.2,1.5,.4,1) forwards;} } @keyframes pdfDraw{to{stroke-dashoffset:0}} @keyframes pdfFade{to{opacity:1}} /* opacity-only: these classes sit on elements positioned by a transform attribute; a transform here would override it and collapse them onto the SVG origin. */ @keyframes pdfRise{from{opacity:0} to{opacity:1}} @keyframes pdfTick{from{opacity:0} to{opacity:1}} @keyframes pdfStamp{from{opacity:0} to{opacity:1}} OFFER SCHEMA · ONE SHAPENDCairline-directGDSfares · availabilityLCClow-cost · extrasOffer {fare basis✓segments[ ]✓baggage✓seat map✓fees✓refund rules✓} · v2 stablethree feeds, one shape Capabilities ## Flights API capabilities Shop - Branded fares - Flexible-date calendar - Multi-city + open-jaw - Live extras (ancillaries) Book - Seat maps + bags - Frequent flyer matching - Booking record (PNR) sync - Schedule-change rebook Service - Refund & exchange - Disruption webhooks - Voucher engine - Auto-rebook policy Compliance - ATPCO + IATA - TSA Secure Flight - EU261 rules - GDPR + DSAR The point Your team works with one offer format. We maintain the airline connections, while keeping each fare’s rules and servicing options visible. — one offer object, no matter who answered Airlines connected517+ Low-cost airlines, direct140+ Median search, cached290ms Who it's for ## Who uses Flights? OTA & meta ### Travel sellers Compare connected airline content in one search. Keep ticketing, changes and refunds in the same workflow. EXAMPLE WORKFLOWCompare airline offers for one route. Fintech & super-apps ### Embedded travel Add a flights tab without becoming a travel company. Our ticketing authority and compliance; your brand and your margin. EXAMPLE WORKFLOWAdd flight booking to an existing app. TMC & corporate ### Managed travel Apply travel policy at search time, bill centrally through lodge cards (a company card held on file), and get disruption alerts your duty-of-care team can act on. EXAMPLE WORKFLOWCheck policy before a business trip. Questions ## Flights: common questions Something we haven’t covered? [Talk to the team](https://www.onarrival.com/company#contact). We can help you work through your integration. **How should I check coverage for my launch?** Start with the routes, airlines and markets you need. During onboarding, confirm the available fares, ticketing setup and supported changes and refunds for that scope. The total airline count does not guarantee that every fare or servicing action is available on every connection. **Do I need my own IATA or ARC accreditation?** No. IATA and ARC accreditation are the licences that let a seller issue airline tickets. You can sell under OnArrival’s ticketing authority from your first booking. If you later get your own accreditation, we switch the issuing path without any API change. **Can travellers really book low-cost airlines, or is it screen-scraped?** Bookable. We have direct API connections with 140+ low-cost airlines, with real inventory and real change and refund flows. Nothing is scraped and no robot fills in a checkout form. **How do changes and refunds work across sources?** You use the same orders API whatever the source. We translate the request into each airline’s own process (NDC OrderChange, GDS reissue, or low-cost self-service) and return one result with the fare difference and penalties listed. **What happens during a schedule change or cancellation?** A webhook (an automatic message to your system) fires with the affected booking and ranked rebooking options. You can accept automatically by policy, show the options to the traveller, or pass the case to a person on your team. **Can I bring my own airline contracts and consolidator fares?** Yes. Private fares, corporate deals and consolidator fares (wholesale airline fares) sit in the same search and are deduplicated against public fares. Your negotiated fare wins when it should. Pairs well with ## Build the rest of the trip. [Product Hotels Hotel booking with property and room mapping built in.](https://www.onarrival.com/hotels) [Product Travel Fintech Add travel insurance to the booking flow.](https://www.onarrival.com/insurance) [Product Bundles Book flights, hotels and activities as one trip.](https://www.onarrival.com/bundles) ## Related reading [All field notes →](https://www.onarrival.com/blog) [Technical · 9 min The NDC capability matrix: what to check before integrating An NDC label does not tell you which bookings a connection can service. Check shopping, booking, changes, refunds and disruption support for the markets you plan to sell. **Aditi Acharya**](https://www.onarrival.com/blog/ndc-capability-matrix) [Technical · 11 min What NDC does not fix in your booking product NDC can improve the airline offers you sell. Your product still needs to handle different carrier capabilities, booking changes, refunds and incomplete responses. **Aditi Acharya**](https://www.onarrival.com/blog/why-ndc-wont-solve-your-immediate-problems) [Comparison · 11 min NDC, GDS and LCC direct: choosing the right mix The right mix depends on the routes, fares and servicing your customers need. Compare airline content sources without forcing each supplier workflow into your checkout. **Ankit Sawant**](https://www.onarrival.com/blog/ndc-gds-lcc-comparison) Start building Try Flights with sandbox access. [Request a key](https://www.onarrival.com/signup) [Read the docs](https://docs.onarrival.com/)