Originally Posted by
anabolism
There are several ways to tell, including cross-checking QR Cargo against the list in the Wiki here, but in my personal opinion, the dead-easiest way to tell is to put the flight and date into ExpertFlyer and check the seat map. Or, if you are confirmed on a flight, check the seat map displayed in the manage booking tab on the QR web site.
just remember people have done this and had qr switch it before the flight