Originally Posted by
UKtravelbear
It's not a simple as sticking a label on a bag.
Interlining bags places all sorts of obligations on the airlines involved which is why many are ceasing to do it for separate tickets.
It can cause them considerable expense if bags get delayed and people need to buy clothes and toiletries let alone the cost of couriers.
It causes me "considerable expense" to buy a plane ticket: yet my return from the airlines, particularly BA, continues to shrink. If Iberia/Vueling can get my bag onto a BCN flight from CPH; it doesn't seem much of an ask for BA and Kastrup to combine a little (very little) effort to transfer it from an incoming flight to an outgoing flight. My bags will leave the baggage handling area: simply to be returned to the baggage handling area. I am merely the unnecessary mule.