In short
Codeshare is an airline arrangement where one carrier markets a flight under its own code while another carrier operates the aircraft. The traveller may buy from the marketing airline, but the operating airline delivers the flight. This distinction matters for display, eligibility, servicing, and traveller expectations.
What codeshare means
A codeshare flight has two roles. The marketing carrier presents and sells the flight under its code. The operating carrier provides the aircraft and crew. Both roles can be visible in a booking path, and both can matter later.
The point of codeshare is network reach. It lets airlines sell journeys beyond their own operated flights, often as part of wider commercial partnerships. For sellers, the task is to make the operating carrier clear enough that the traveller understands who will actually fly the service.
Why the distinction matters
The marketing carrier may shape the offer, but the operating carrier may govern some onboard or airport rules. That can affect seat characteristics, service availability, check-in guidance, and disruption handling.
Codeshare is therefore more than a label in a flight number. It changes how information should be displayed and how post-booking questions are routed. A clear seller shows the relationship without making the traveller decode airline terminology.
Commercial impact
Codeshare can improve choice and coverage, especially on itineraries that cross regions or connect networks. It can also add friction if paid options are shown without enough context.
For merchandising, the safest approach is to respect the operating carrier's rules and present the option in plain language.
Frequently asked questions
What is a codeshare flight?
It is a flight sold under one airline's code but operated by another airline.
Which airline operates a codeshare flight?
The operating carrier flies the aircraft, while the marketing carrier sells the flight under its own code.
Why does codeshare matter after booking?
It can affect which rules apply, who handles service questions, and how options are shown to the traveller.