Interline Agreement
Definition
A commercial agreement between airlines that allows passengers to travel on itineraries involving multiple carriers on a single ticket, with baggage transferred between airlines.
Related Terms
Codeshare
An agreement between two or more airlines to sell seats on the same flight under their own flight numbers. Allows airlines to offer more destinations without operating additional flights.
Airline Alliance
A partnership of multiple airlines that coordinate schedules, share frequent flyer programs, and provide seamless connections. The three major alliances are Star Alliance, SkyTeam, and oneworld.
Connecting Flight
A flight that requires passengers to change planes at an intermediate airport to reach their final destination. Allows airlines to serve more city pairs through their hub system.