I live in Toronto. I'm flying down to LA this summer as part of a summer program at UCLA. They've offered to reimburse me up to $600 USD for travel. I have a friend who lives in Vancouver, and so I'd love to be able to fly to LA via Vancouver, and maybe hang out with him for a night or so.
The catch is that my summer program, being American, will only reimburse me for flights purchased through US-owned airlines. Is there a way for me to fly Toronto to Vancouver on a US-owned airline for cheap-ish (under $300)? From a quick search I do, all the cheap flights are on Canadian airlines.