Originally Posted by
ChrisA330
On your return, you'll clear Canadian Immigration & Customs on arrival in Toronto
Canada does not do US style Immigration and Customs at foreigh airports, so Toronto indeed.
Originally Posted by
aaflyer93
Leaving the US, this will feel like any other domestic flight - nothing special or no extra security theater... you will only have some kind of immigration clearance when arriving.
Um, NO, and it seems AC is even more strict IME.
You will be asked to show your passport prior to boarding and again along with your BP as you board. Unless things are done differently at LAX, which I seriously doubt.