I've never flown to/from YYZ before, but will be next month.
On our return we are on UA, leaving at 9:40 am. I don't want to get there SO early that I clog up with people who have earlier flights but I also don't want to miss ours.
We're staying at the Sheraton on airport so will have to take that tram over to UA - what time advice do you have for us?