What does "codeshare" mean?

An 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

noun, verb

noun, verb ·Rare ·Advanced level

Definitions

Noun

1
An 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.

Verb

1
To buy space on (a flight) in this way. ambitransitive

Etymology

From 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.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.