Originally Posted by nmpls

FWIW, connecting through YUL was an absolute disaster last week, and I'm glad I didn't leave the airport if this is how everything run.
>1 hour to clear USA security and customs. The issue was entirely security as they only had 1 lane open (of 2) for at least my 787-9 full of connectors v. even more. Every transborder flight including mine seemed to be delayed for hours waiting for dozens of pax to clear international to USA customs. They had AC staff manning security, helping out where possible, and pulling people up who's flights were already 1-2 hours past push time because they weren't going to hold them much longer. This delay on my flight led to a substantial delay of an hour at SFO too, so we arrived at the gate 2 hours and 55min late, just shy of the time needed for compensation -- kind of interesting how they found a gate right then.
Honestly, this plus YYZ issues makes me seriously rethink international-USA flights on AC.