134 Travel APIs: Kayak, Yahoo Travel and HotelsCombined

ProgrammableWeb recently published an updated analysis of the top free and paid Travel APIs available in our directory.  Please click here to read the full analysis.

Our API directory now includes 134 travel APIs. The newest is the TakeABreak API. The most popular, in terms of mashups, is the Kayak API. We list 12 Kayak mashups. Below you'll find some more stats from the directory, including the entire list of travel APIs.

In terms of the technical details, REST and XML lead the way. There are 91 travel REST APIs and 25 travel SOAP APIs. Our directory lists 100 travel XML APIs and 51 travel JSON APIs.
The most common tags within travel are 27 travel booking APIs, 21 travel transit APIs and 14 travel hotel APIs

On the mashup side, we list 497 travel mashups. We named sketchmap as mashup of the day in February. For reference, here is a list of all 134 travel APIs.

  Active.com Camping API: Access campground database.

  Add To Trip API: Social trip planning service.Track this API

  Adriatic.hr API: Croatian travel accommodations service.

  AdventureLink API: Travel search and booking service.Track this API

  AgentFactor Travel API: Travel booking service.Track this API

  Amadeus API: Travel industry transaction processing service.Track this API

  Amadeus Cruise API: Cruise line transaction processing service.Track this API

  BART API: Transit tracking service for San Francisco, California.Track this API

  BestParking API: Paid parking location service.Track this API

  Bing Traffic API: Traffic information service.Track this API

  Bistip API: Travel and purchase service.Track this API

  BookingMarkets API: Travel web site platform.Track this API

  BookingSync API: Vacation Rental Booking Service.Track this API

  BookIt API: Travel booking services.Track this API

  Castilla-La Mancha API: Spain tourism information service.Track this API

  Cleartrip API: Travel booking services.Track this API

  Cleartrip Hotel API: Hotel booking service.Track this API

  Conferma Booking API: UK travel booking and reconciliation service.Track this API

  Conferma CSP On-Demand API: UK travel booking service.Track this API

  CTA Bus Tracker API: Chicago transit tracking service.Track this API

  CTA Customer Alerts API: Chicago transit tracking service.Track this API

  Destinde API: Travel information service.Track this API

  Deutsche Bahn Openbahn API: German travel portal.Track this API

  Dolphin Dynamics API: Travel industry transaction processing service.Track this API

  dopplr API: Community travel service.Track this API

  EasyToBook API: Hotel Search and Booking Service.Track this API

  Escapia Vacation Rental Network API: Vacation rental booking.Track this API

  Evature Travel Search API: Free text travel search query service.Track this API

  EveryTrail API: Travel experience platform.Track this API

  Expedia API: Travel booking service.Track this API

  Eyewitness Guide to London API: Travel guide to London.Track this API

  FlightAware API: Live flight aircraft tracking.Track this API

  FlightCaster API: Flight delay predictor.Track this API

  FlightLookup API: Flight Schedules and Airport Lookup Service.Track this API

  FlightStats API: Live flight aircraft and delays tracking.Track this API

  FlightView API: Live flight aircraft and delays tracking.Track this API

  Flightwise API: Flight tracking service.Track this API

  FlyOnTime API: Flight time and delay resource.Track this API

  GetYourGuide API: Travel tours and activities booking service.Track this API

  GroundLink API: Ground transportation service.Track this API

  HipGeo API: Trip tracking and recording application.Track this API

  HotelBeds API: Travel accomodations service.Track this API

  HotelsCombined API: Hotel comparison search / aggregator.Track this API

  Hotwire API: Travel deals and historical price data from Hotwire.com.Track this API

  Hotwire Hotel Shopping API: Hotel shopping service.Track this API

  Hotwire Rental Car Shopping API: Rental car shopping service.Track this API

  Hotwire Travel-Ticker Deals API: Travel deals service.Track this API

  InKnowledge Taxi Fare Calculator API: Taxi fare estimation service.Track this API

  iSeatz API: Customized online travel and entertainment solutions.Track this API

  iwannagothere API: Community-based travel guide.Track this API

  jakdojade.pl API: Polish transit service.

  Jeppesen Journey Planner API: Trip planning service.Track this API

  Kayak API: Travel search service.Track this API

  Kelkoo API: Comparison shopping service.Track this API

  Kijubi API: Activity marketplace service.Track this API

  King County Busses API: Transit tracking service.Track this API

  Kumutu API: Adventure sports distribution service.Track this API

  Lonely Planet API: Travel guidebook content services.Track this API

  Mapnificent API: Public transportation map service.Track this API

  Massachusetts Port Authority API: Data feeds for Massachusetts Port Authority.Track this API

  Merrcury API: Travel shopping service.Track this API

  Metro Traffic API: Real-time traffic data service.Track this API

  Metro Trip Planner API: Los Angeles Metro transit information.Track this API

  Minube API: Social travel recommendation site.Track this API

  Moneydirect API: Multi channel payment platform.Track this API

  MTA API: New York City Transit service.Track this API

  MyBikeLane API: Read-Only API for MyBikeLane and UncivilServants Database.Track this API

  MyTravelToolbox API: Travel website application.Track this API

  MyTTC API: Realtime Toronto transit information.Track this API

  NAC Real-time Routing API: Realtime driving directions service.Track this API

  NAVTEQ Traffic API: Local traffic information service.Track this API

  Nevistas News API: Hotel and Travel News Search Service.Track this API

  Nextstop API: Travel recommendation service.Track this API

  NileGuide API: Travel research and planning service.Track this API

  OneBusAway API: Realtime Seattle transit information.Track this API

  ParkWhiz API: Access to parking and event data.Track this API

  Paynoy API: Philippines deal service.Track this API

  PilotOutlook API: International airport data.Track this API

  Placr API: UK transit data service.Track this API

  Planyo API: Online reservation service.Track this API

  Pocket Village API: Travel search and booking service.Track this API

  Postcode Anywhere Distances and Directions API: Business travel data service.Track this API

  Postcode Anywhere Route Optimisation API: Find best route between locations.Track this API

  Public Transit Data Community API: US transit data feeds service.Track this API

  Qype API: Local reviews service.Track this API

  RatePubs API: Pub and bar reviews services.Track this API

  Rezgo API: Travel tour booking service.Track this API

  Rome2rio API: Travel itinerary search service.Track this API

  Roomorama API: Short-term travel rental service.Track this API

  Rutamina API: Travel route planning and sharing.Track this API

  Sabre API: Travel industry transaction processing service.Track this API

  SilverRail Technologies API: Rail travel planning service.Track this API

  Skyscanner API: Flight and travel search engine.

  SmartTravelDeals API: Travel offer publishing and search.Track this API

  SMSMyBus API: Madison transit service.Track this API

  StrikeIron Address Distance API: Calculation of distances between addresss.Track this API

  Superbreak API: Travel booking services.Track this API

  TakeABreak API: Australian vacation/holiday property web service.Track this API

  Taxi Magic API: Taxi booking service.Track this API

  TÃ¥gtider Trains API: Sweden train schedule lookup service.

  Tgels API: White-label airfare search and comparison service.Track this API

  Tixik API: Famous places GPS services.Track this API

  to.uri.st API: Travel and tourist database services.

  TourCMS Marketplace API: Online travel reservation service.Track this API

  TouricoHolidays API: Travel booking service.

  TrafficViolators API: Community traffic watch initiative.Track this API

  Transport for London API: UK transportation service.Track this API

  Travel Booking Engine API: Online travel booking service.Track this API

  Travel Connectivity XML API: Travel content and data provider.Track this API

  Travel IQ API: German travel booking service.Track this API

  TravelFusion API: Travel Flight Booking API.Track this API

  Travelport API: Travel booking service.Track this API

  TravEnjoy API: Travel search service.Track this API

  Trazzler API: Travel recommendation service.Track this API

  TriMet API: Transit tracking service for Portland, Oregon.Track this API

  TripAuthority API: Hotel reservation service.Track this API

  TripIt API: Online travel itinerary service.Track this API

  Tripl API: Social travel service.Track this API

  TripSay API: Social travel search and recommendations service.Track this API

  TripTracker API: Trip Tracking Service.Track this API

  Tube Updates API: Unofficial London transit service.Track this API

  ValueCommerce Travel API: Travel web service.Track this API

  ViaMichelin API: Mapping, directions, and travel booking services.Track this API

  Viator API: Travel affiliate services.Track this API

  Volkswagen Reviews Network API: Chinese city and shopping guide.Track this API

  Waze API: Social navigation application.Track this API

  Wcities API: Travel guide and information service.Track this API

  Webcams.travel API: Webcam repository.Track this APITrack this APITrack this APITrack this APITrack this APITrack this API

  Where I've Been API: Social mapping and travel service.Track this API

  Winnipeg Transit API: Transit data service.Track this API

  WMATA API: DC Transit Service.Track this API

  Yahoo Travel API: Online travel services.Track this API

  Yapta API: Airfare Tracking Service.Track this API

  Zoombu Fly API: Travel search service.Track this API