Infant
CXR – Carrier
Customs
CTI – Computer Telephony Integration
CTD – Corporate Travel Department
CT – Circle trip
CST – Central Standard Time
CSR (2) – Central Security Record
CSR (1) – Corporate Social Responsibility
Cruise
CRM – Customer Relationship Management
CPT – Cost Per Transaction
CPM – Cost Per Mile
Corporate rate
Corporate fare
COP – Country of payment
Contract fare / contract discount
Continental breakfast
Contact center
Contact
Construction point
Consortium
Consolidator
Consolidation fare