A4U Airlines For Europe AAA
  Abacus Abelow Public Relations
  Abercrombie & Kent About Airport Parking
  ABTA Accenture
  AccorHotels ACTE
  Adelman Travel Adventure Travel Trade Association
  AdvertisingAge Aer Lingus
  Aeroflot Aeromexico
  Aeroports De Montreal AHLA
  Air Canada Air China
  Air France Air India
  Air Line Pilots Association Air New Zealand
  Air Transport Association Airbnb
  Airbus AirDepartment.com
  AirHeart Pet Hospital Airline News Resource
  Airline Passenger Experience Association Airlines for America
  Airlines Reporting Corporation (ARC) Airports Council International
  AirTran Airways Alamo Rent A Car
  Alaska Airlines AlaskaCruises.com
  All Nippon Airways All Star Vacation Homes
  Allegiant Allied Pilots Association
  Amadeus America West
  American Airlines American Cruise Lines
  American Eagle Airlines American Express
  AOL Apical Resource Group
  Apple Inc. ARDA
  Arebbusch Travel Lodge ArrivalGuides
  ASBTA ASEAN Tourism Association
  Asia Pacific Airlines Association Aspire Marketing
  Association of Asia Pacific Airlines Association of Flight Attendants
  Association of Travel Marketing Executives Association of Travel Marketing Executives (ATME)
  ASTA Astrum Helicopters
  ASUR ATA Airlines
  Atlas Safety & Health ATRIP
  Avalon Report Avianca
  Avis Budget Group Azul