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TripStack API

The TripStack flight booking API provides access to the world's most important Low-Cost-Carriers (LCC), NDC API connections and Virtual Interlining (VI) fares.


The flight booking API is simple to integrate and includes the most important ancillaries: Baggage, Seat Selection and Branded Fares. Without any mark-up added to the fares in the flight booking API, it is highly competitive with access to fares not available through other distribution channels.


Low-Cost-Carrier (LCC) Integrations

  • 100+ of the world's most important LCCs in our flight booking API

  • Access to fares not readily available via other distribution channels

  • Baggage, Seat Selection (with full seat maps) and Branded Fares are available in our flight booking API

  • No markups or additional fees added to the fares

  • Cost effective booking fee

Virtual Interlining (VI) fares

  • Virtual Interlining fares available alongside LCC and NDC content in our flight booking API

  • Virtual Interlining fares include combinations from LCC, FSC and NDC content

  • Highly customizable flight booking API allowing for the selection of airlines & minimum / maximum connect times

  • Advanced features include 2+ transfers & airport transfers

  • TripStack builds the Virtual Interlining fares and allows the customer to book the flight components using their preferred provider

  • Virtual Interlining Guarantee protects the customer from missed connections due to delays and schedule changes

  • Cost effective Booking fee as a % of the total fare

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NDC API Integrations

  • IATA qualified NDC Airline Retailer

  • NDC 17.2 Certified - Registry

  • Growing list of NDC API integrations that includes the most important Full-Service-Carriers (FSC) and Low-Cost-Carriers (LCC)

  • Full NDC capability including Shopping, Booking, Ticketing

  • Ancillary support including baggage, seat selection and branded fares

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Virtual Interlining (VI) by the Numbers


VI with 1 transfer


VI with 2+ transfers


VI with Airport Transfer


VI Itineraries combining 2 or more Low-Cost Carriers 


Global routes where VI produces the cheapest or best itinerary


Average Order Value (AOV) for VI fares


Average markup applied for VI fares with respect to the base fare


Top VI Airport Hubs

Integration Guide & Self-Serve Portal

  • Online flight booking API documentation available here

  • Flight booking API Integration guide with request & response examples for LCC, NDC and Virtual Interlining fares

  • Self-Serve Portal to simplify booking management and API configuration

  • 24/7 Dedicated Integration Support

  • Integrate in 4+ weeks and start selling LCC, NDC & Virtual Interlining fares

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Flight booking API performance metrics

  • High Availability with 99.9% system uptime

  • Multi Cloud Hosted with GCP, AWS

  • Fast response times: < 1 sec at search

  • 100M+ Daily API searches

  • High Bookability: > 90%

  • 24/7 customer support

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Want to learn more about Virtual Interlining, Self-Connect or our flight booking API?  Fill out the form or send us an email to to schedule a call with our Sales Team.

Thank You. We will be in touch shortly.

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