Not sure how much difference it makes, but I expect that that flight will be operated by Alaska. AA don't do seem to anything going north from SFO (PDX,SEA etc) leaving that to AS.

I've noticed that flights to Canada can be quite pricy from the states, but have been able to get reasonable prices on the west coast. Had LAX -YVR for around £80 once, which I thought was quite good given the distance. So if it doesn't work out with the redemption you could buy a single and do an open-jaw. Although you may have already thought as much.