Tried searching but could not find an answer. Am traveling to USA via Toronto. Have a 2 hour transit on way into the USA (from U.K.) which I think is probably just about OK to do all the pre-clearance stuff in Toronto.

On on way back, I have a 5.5 hour stop in Toronto. Was wondering if its possible for me to leave the airport in Toronto - have dinner somewhere close by (but not inside the airport)? Is that possible with all the pre-clearance stuff that goes on?

Its pretty clear how stuff works when you are going to the US - seems streamlined. But little info on how the return journey works.

Any insights?