I didn't think Bangkok Airways interlined at all. But then some friends were flying HKG-BKK-USM on TG and PG and TG checked their bags all the way through in Hong Kong. And they made it. Anyone know if they'll interline with CX? Flying USM-BKK-HKG on PG and CX, separate tickets, would love to check bags all the way through at USM (assuming I can clear passport control at USM and be treated as a transit passenger at BKK, as I do at HKT or CNX).