Originally Posted by
Lllahim
I am sorry you are wrong. The YYZ pax to SYD can request YYZ - YVR five hours earlier but cannot request YVR - SYD at the same time. That request is based on departure time at YVR. Actually even though it is the same plane, AC treats YYZ-YVR as domestic (NA) and YVR - SYD as international. If you are in Y cabin on that plane, you buy your food YYZ-YVR. You actually have to deplane in YVR and reboard later. You get "free" food YVR-SYD.
I'm also sorry but you are completely wrong. If you are booked on AC 33 YYZ-SYD, it is considered as one through flight, and the upgrade request is YYZ-SYD. You get ONE BP and YVR is in fact never mentioned despite the stop. On my most recent experience, I was waitlisted at T-7 to SYD from YYZ while R space was available YYZ-YVR. My upgrade cleared at the gate in YYZ, but all the good seats were occupied by YVR passengers.
It remains my impression, however, that YYZ originating passengers will trump YVR originating passengers if they miss out on YYZ-YVR but space is available YVR-SYD.