Interline describes an agreement or movement where passengers or cargo transfer between different transport companies during a single journey. In aviation, an interline agreement allows airlines to handle passengers and baggage across multiple flights with one check-in. In freight, it means a shipment is handed off from one trucking company or railroad to another to reach a destination outside the originating carrier's network.
Heard on the job
They booked an interline ticket, so their bags should automatically transfer to the partner airline in Dubai.