My first post (after being a very impressed lurker) so sorry if it sounds ignorant or should be in another thread ;-).

I'm traveling on a North America Flight Pass from LAS to YOW in a week and got afternoon routing through YYZ. I would prefer to go via YVR on early morning flight with husband but it's sold out.

Anyone have experience standing by with Flight Pass? I've used them quite a bit but never tried to stand by. Thanks!