Originally Posted by
clsdn
Yes - you can double upgrade from Y to F provided there is availability in F and you have enough avios/qCredit.
So I've just booked some Y flights for LHR-BKK-DOH-BKK-LHR, I have ascertained standard (non-2x) award availability in F on both the BKK-DOH and DOH-BKK legs (no J award availability on both). But the QR "upgrade with Avios" page does not show any availability for a Y-F upgrade

Any suggestions? Would this require phoning QR?