The one time I'm not in Edmonton and the extremely rare time I'm beginning a trip from Calgary, on January 5, there's a YEG-YYZ AC 168 flight with a 777.

So all my flight searches, for bottom dollar, is feeding through YEG for cheapest to try and get me on the 777, and of course the presumed lower capacity from YYC (and maybe YVR upstream) means that it's slightly more expensive for me to take the shorter route.