Can’t be air canada and repressed trauma prevents me from acknowledging WestJet’s existence, so I’m going to guess the good one is Harbour Air. They run the cute little seaplanes you see around Vancouver and Victoria. I hear that boarding one when the system clock is set to 3am unlocks a special area where you can catch spirit bears.
It’s not impossible to invade the US. It’s been done several times already, for example 1942 and 1812. Mexico, which shares the same oceanic borders, was invaded by France in 1861 and of course the entirety of the Americas was essentially invaded by colonial settlers.
It’s unlikely for other reasons, but nothing about it is impossible.