CA Customer Alliance Cadabra
  California Tourism California Travel Association
  Canadian Tourism Commission Canadian Transportation Agency
  Candlewood Cape Air
  Capital Airlines Careerbuilder
  Caribbean Cruise Line Caribbean Hotel and Tourism Association (CHTA)
  Caribbean Tourism Organization Caribbean Wedding Association
  CaribbeanWay Carlson
  Carlson Rezidor Hotel Group Carlson Wagonlit
  Carnival Corporation Carol Verret
  Cathay Pacific CCRA Travel Solutions
  Celebrity Cruises Cendant
  Cendyn Center for Marketing Effectiveness
  CEO Strategist Certain Software
  ChainHotels.com Charlie Cook
  CHART - Council of Hotel and Restaurant Trainers Cheapflights Ltd
  CheapHotels.org CheapOair
  China Airlines Choice Aire
  Choice Hotels Circle Line Sightseeing Cruises
  City Accommodation CK Consulting
  CLIA ClickZ
  Club Med CNN
  CNW Conde Nast Traveller Luxury Travel Fair
  Condo Hotel Center Condor Airlines
  Connected Traveler Constant Contact
  Consumer WebWatch Contiki Holidays
  Continental Airlines Convention Industry Council
  Copa Airlines COPC Inc.
  Cornell Cornell Center For Hospitality Research
  Cornerstone Information Systems Corporate Planners Unlimited
  Costa Cruises Coyle Hospitality Group
  Crowne Plaza Cruise Industry Wire
  Cruise Shipping Miami Cruise West
  Crystal Cruises CSA Travel Protection
  Cultural Restoration Tourism Project Cunard
  Custom Aire Travel Cvent