Originally Posted by
briantoronto
If you are coming into Terminal 1, and departing Terminal 1, you will bypass Canadian C&I and make your way directly to US C&I.
Brian
the OP is fine in this case (US citizen), but just in case anyone finds this thread in the future, it's unlikely any airline will board you without a a canadian visa if one is required (even if you're connecting to the us), since I don't know if any airline considers this 'real' sterile transit.
I could be wrong, though..can anyone confirm/deny?