C
- Cabin Cuddler
- Caesars Palace Las Vegas
- Camping World
- Candlewood Suites
- CARES - Kids Fly Safe
- Carnival Cruise Line
- CarRentals.com
- CaseLogic
- Celebrity Cruises
- cFares
- Cheap Flights
- CheapCaribbean.com
- CheapOair
- CheapOstay
- CheapTickets
- Choice Hotels
- Circus Circus Las Vegas
- Circus Circus Reno
- City Experts NY
- City Sightseeing Cruises
- City-Discovery.com
- CityPass
- Clarion Hotels
- ClearBackpacks
- ClubMed
- CODi Online
- ColoradoBaggage.com
- Comfort Inn Hotels
- Comfort Suites Hotels
- Conrad Hotels & Resorts
- Context
- Costa Rican Vacations
- Country Inns & Suites
- Courtyard Hotels
- Crown Paradise Resorts
- Crowne Plaza Hotels
- Cruise Director
- CruiseDirect
- CruisesOnly.com
- Crystal Cruises