Originally Posted by
Phudnik
Since YUL is international, you will need to check in and check bags (if you are doing so) no later than 60 minutes before the flight. If you have already checked in online and have no bags to check, you should be fine.
PreCheck is now possible on international itineraries, though of course there is no PreCheck line at Terminal F'ed. In my limited experience, the line there is rarely long, so going through PreCheck at C or D/E and taking the shuttle may not save you much time, if any, though it will probably save you a trip through the millimeter-wave machine.
I just got F'd, and they had pseudo precheck. They put an orange sticker on my boarding pass and I was permitted to keep my shoes on. I assume I could have left my baggie in my bag, but I predicted that they wouldnt know which was my precheck bag as it went through the xray so I took it out.