Originally Posted by
quoo
Do you know if I have to clear immigration at YYZ?
It's a bit of a silly reason but I'd rather not miss the connection because this is one of the few flights that has layflats

Yes, but that shouldn’t take more than a couple of minutes. If you’re arriving business class you’ll be first off. Of course there are some transborder gates that are a fair distance from immigration, but it’s still very doable if your inbound flight is relatively on-time. But if you’re going to stress about it, then peace of mind may make it worth a change.