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Codeshare in aviation

Codeshare or codeshare agreement is an arrangement that often exists on top of the interlining relationships between two airlines. This agreement enables both carriers to sell and market seats on each other’s flights as if they operate them themselves, i.e., using another airline’s flight codes.

This way, both carriers get access to new routes and expand their reach without increasing fleet size. Besides, they gain more control over itinerary combinations and ticket prices and can spread their loyalty programs across codeshare flights.

Also, since GDSs prioritize online connections (between flights of the same airline) over interline connections (involving planes from different airlines), codeshare flights are more likely to be sold as they appear under one carrier’s umbrella.

For travelers, the primary benefits of such connected codeshare trips are simplified booking flows and seamless transfers.