Codesharing is an agreement between two (or more) airlines to sell seats for the same flight. While only one airline operates ...

This is a common scenario with travelers who unknowingly booked a codeshare flight. The U.S. Department of Transportation describes codesharing as “a marketing arrangement in which an airline ...

and many of us will have traveled on a codeshare flight, knowingly or otherwise. However, there is a lot that goes on behind the scenes when it comes to regulating codeshare agreements.