code + share, because of the change in the flight's two-letter airline identity code. One aircraft will have two or more codes and flight numbers.
codeshare (plural codeshares)
- (aviation) Agreement whereby an airline buys space on another airline and markets the extra space as its own. Often used to increase a route network without the costs of running a full service.
codeshare (third-person singular simple present codeshares, present participle codesharing, simple past and past participle codeshared)
- (aviation, transitive, intransitive) To buy space on (a flight) in this way.