Which of the following describes the boarding airline?

The boarding airline refers to the airline that physically operates the flight and is responsible for transporting passengers to their destination. This means that the boarding airline has the responsibility of ensuring that passengers are onboard the aircraft and that the aircraft departs and arrives as scheduled.

When passengers check in and go through the boarding process, they do so with the airline that is actually providing the aircraft and crew for that specific flight. This is distinct from other roles; for example, while an airline may issue boarding passes, this does not necessarily mean it is the airline that operates the flight. Similarly, in-flight meal services may be provided by the boarding airline or outsourced to a third-party vendor, and flight cancellation notices are typically managed by the airline operating the flight at the time of cancellation. Therefore, identifying the boarding airline as the one that takes passengers to their destination is the most accurate definition.