> This means the airport needs to designate one part of the terminal (or build a new one) for U.S. departures which is sealed off past the U.S. Immigration chec

> This means the airport needs to designate one part of the terminal (or build a new one) for U.S. departures which is sealed off past the U.S. Immigration checkpoint. All Canadian international airports are set up this way, and frankly it sucks. The worst part is you need to budget quite a lot of extra travel time before your flight since you need to clear customs before boarding the plane. Less terrible but still annoying, since there's a separate terminal just for US departures, if your party is going to different (US & non-US destinations) you have to split up.