o cabin crew
o cancel a reservation
o capacity controlled
o car class
o car hire agent
o car-hire/rental company
o car park
o car rental agreement
o car-hire office
o carrier
o carry-on (bag)
o cash a cheque
o catering services/facilities
o CDW (collision damage waiver)
o chambermaid
o change a booking
o charter
o checked baggage
o check in (at a hotel)
o check in (at an airport)
o check out (at a hotel)
o check out (at an airport)
o check-in-time (at an airport)
o city pair
o class of vehicle
o commission
o companion fare
o complimentary / comp room
o conference facilities
o conference room
o confidential tariff
o confirm a reservation
o connecting flight
o connecting point
o connection
o convention hotel
o corporate insurance policy
o corporate rate
o coupon
o credit card
o CRS (Computerised Reservation System)
o cultural tourism