Originally Posted by
jozdemir
As I general rule I assume that a *A carrier won't transfer to a OW carrier, but I was flying from LGA-ORD-DFW-BNE earlier in the year with the first leg on UA and the rest on AA/QF and the UA agent actually offered to tag my luggage all the way through to BNE, so I was pleasantly surprised with that.
Interlink baggage agreements are between individual airlines, not airline alliances. You can definitely have bags transferred from one airline to another in different alliances, although it looks like some airlines are starting to limit/discontinue baggage transfers not on same record.