I have an 6-hour transit coming up in Montreal (YUL), and I'd like to drop into town for coffee/lunch with some old friends. Realistically, how much time can I spend in the city?
Details: I'll be coming in from Europe, so I need to go through immigration, and I'm continuing to the US, so I need to go through preclearance as well. Both flights on Air Canada so I'll likely have my connecting boarding passes already, I have an APEC travel card that gets me priority immigration, and have no checked bags. The 6-hour window is during the day outside rush hour.
My guessestimate: 30 min to clear incoming immigration (APEC lane), 45 min to hop on the 747 bus and get to the city, 45 min to get back, 1 hour to get through security and US preclearance (access to crew lanes via APEC) and make my way to the gate. This adds up to 3 hours, leaving me with 3. Add a little buffer both ways, and I should have around two hours in town?