Originally Posted by
plunet
Unless I am missing something SQ is StarAlliance so QR are very very unlikely to interline.
I don't know if QR has an IL agreement with SQ, but it isn't unheard of that airlines of different alliances have IL agreements with each other. AFAIK, KL and SQ have an agreement. AF has one with SQ as well. CX has an agreement with LH. etc.
The question will be if they interline on separate tickets. Personally I very much doubt that.