Originally Posted by
Kremmen
The QF situation is a (hopefully) unusual one. QF policy changed a few years ago to screw over anyone connecting to a non-OW carrier issued on a separate ticket by not interlining luggage. Interlining is still possible, because interlining on the same ticket still has to work, but they choose to refuse to do it otherwise.
This is not unusual at all. UA is generous in terms of interlines to OALs across separate tickets.