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Codeshare

A flight marketed under multiple airlines' codes but operated by one.

Full definition

A codeshare flight has one operator but appears on multiple airlines' schedules. Example: a Delta flight JFK-LHR might also be sold as an Air France code and KLM code.

Codeshares matter for award booking: you're usually flying the operator's plane, but mileage accrual and cancel/change policies depend on the issuing carrier. Check which code your ticket is issued under.

Related terms

Interline Agreement
A bilateral agreement between airlines to accept each other's tickets and baggage.Airline Alliance
A group of airlines that share ticketing, baggage, and frequent flyer benefits.

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