What is baggage tagged according to a passenger's itinerary involving multiple airlines called?

Baggage tagged according to a passenger's itinerary involving multiple airlines is referred to as interline baggage. This concept arises when a passenger travels on a journey that includes flights operated by different airlines, often as part of a single itinerary. In such cases, the baggage must be transferred between the various carriers.

Interline baggage agreements allow airlines to collaborate, ensuring that baggage is handled seamlessly across the different airline operators. This process typically involves tagging the baggage with information related to the complete travel itinerary so that it can be routed and delivered correctly to the final destination, even when multiple airlines are involved.

The significance of this practice lies in facilitating smoother travel experiences for passengers, reducing the risk of lost baggage and streamlining the transfer processes. While other terms like "Misconnection" or "Maas Passenger" do exist in the aviation context, they do not specifically refer to the concept of baggage being handled across multiple airline operations.