Originally Posted by
mtp1980_fly
I booked the flights using a multi city reward, so I'm not sure if that is different from two one ways.
Also, I'm not sure what you mean by paying for J and sitting in PY and requesting an upgrade? could you clarify please?
If it's one booking, the entire thing is either paid for as F, J, PY, or Y. You can't upgrade "half" of it (in terms of the number of miles you pay).
If you pay with J miles, and there are no J seats, but there are PY seats, you can confirm a seat in PY.
For Air Canada operated flights, you can get yourself on the upgrade list once you get to the airport, if you're not confirmed in the cabin you're ticketed in (so if you pay for J and you're confirmed in Y or PY). Then if there are seats available, you'll get an upgrade at the gate.