Interline or codeshare? It can make a big difference, but I don't recall UA codesharing with QF or JQ.For example was a time when UA would use QF, JQ or/and VA as tag on/feeder flights.
Really just a travel agent for AU domestic flights to get a sale on the long haul. Just business:- nothing to do with alliance or ff partners.
UA still have interline with QF and JQ. TK already have an interline with QF and JQ (but not VA). cough, even QR have an interline with QF and JQ.

