Originally Posted by
agehall
It is fairly safe to assume that if you can buy it on one ticket, you will be able to check luggage thru as well. In my experience, baggage interline agreements are more common than ticketing interline agreements.
I don't think that's correct actually. Ticketing agreements are widespread - bear in mind that interlining is not about common fare but just about plating and allowing end on end really. So for instance, this includes various local and regional airlines with which there might occasionally not be luggage interlining agreement for whatever reason.