Originally Posted by
drvannostren
I'm not sure what you're doing...flying WestJet YYZ-YYC then flying AC YYC-YVR? I can't imagine why you'd do that but...you won't need to leave airside unless you have a bag. You won't be able to get your bag tagged all the way through. If you've checked in for both flights and have boarding passes and no bag. You should be able to just walk from one gate to the other without issue.
Not sure that is true, is it? You can walk between A and B gates without passing through security, but I don't think you can get all the way to D (WS gates usually). Typically the C gates are used for flights to the USA and are locked off from both B and D because you pre-clear customs in YYC.
Edit: map is here:
http://www.yyc.com/portals/0/interac...ame=Departures And the secure American departures area encompasses gates 25A to 32.