There's a lot of discussion here in relation to early morning flights, but can anyone offer a perspective on how much time is needed for later morning departures? AA YYZ-DCA at 11am on a Wednesday. Economy, no checked bag, no GE.
In T1 by 11 the morning rush is usually gone so you're through security and pre-clearance in 15 or 20 minutes. I rarely fly though T3 so I can't confirm that it's the same. Check the departures board and see what else is heading to the US around that time. If its vacation flights you'll want more time.