Originally Posted by
Kremmen
I don't understand this at all. Two airlines receive revenue for the tickets they sold.
Yes but only on one booking/PNR. If you made two separate reservations (CX for say F seat HKG-JFK and AA for Y seat JFK-DCA), AA will not get a piece of what you paid CX for the F seat. AA doesn't even know that your starting point is HKG and not JFK (until you request interline).
Originally Posted by
Kremmen
When you interline bags, you save the second airline significant money (check-in agent's time) and save the airport money (not having to send your bag all the way to baggage claim and then all the way back into its system again). Plus, you save the airport in security, because the passenger doesn't go landside. It's a win for everyone.
And why would the first airline care whether the second airline save significant money?

It cares when both are under common ownership (hence why CX still provides the service on separate PNR as long as the second flight is on CX/KA) but in the example above, why should CX care that interlining saves AA significant money?
Same about the airport. Why would the first airline care whether the airport save money?

It's not like the first airline owns the airport.
Originally Posted by
Kremmen
It's a win for everyone.
It's a win for everyone but the airlines hence why they stop it. Otherwise, don't you think airlines would've continued to offer it?
Originally Posted by
Kremmen
If a bag goes missing, that will most likely happen anyhow. (Unless you are saying that it's somehow harder to route it to the next plane than to baggage claim.)
And if the first flight gets delayed and your bag cannot make the connecting flight (but you did), who should pay to transport your bag to the next destination? On a single PNR airlines have arrangement for these things but on two separate PNR, the first and second airline doesn't even know your plan to connect until you check-in.