Originally Posted by
CMHFlyerOH
I believe it is illegal to connect in Canada for a domestic US flight. That explains why you never see flights from the "lower 48" connecting in Vancouver or Toronto en route to ANC.
I've seen United Easy Schedule (the PC version) pop up domestic routes through Canada before. E.g.: MCO-YYZ-DEN-ANC, SAN-YYZ-PHL. Etc.