A survival guide for clearing customs before your flight.

US Pre-clearance at Montreal-Trudeau allows you to clear US customs in Canada before boarding, eliminating immigration lines upon arrival.
US Pre-clearance facilities are located inside YUL terminal for flights to the United States. You pass through US customs inspection before boarding, arriving in the US as if you were domestic.
Bring a valid passport (minimum 6 months validity). US visas if required. ESTA approval if you're a visa waiver country national. Customs declaration forms (available at the facility).
Allow 45 minutes to 2 hours for pre-clearance, especially during busy travel periods. The process includes passport verification, customs questions, and baggage screening.
Avoid long immigration lines upon arrival in the US. Move directly from baggage claim in the US. Significant time savings, especially for connecting flights.
US citizens can use pre-clearance. Permanent residents must use standard customs. Visa waiver program participants and other nationals can use it if eligible.
Arrive at the airport early. Have documents organized and easily accessible. Answer customs questions honestly and directly. Dress neatly as presentation matters. Know your trip details and accommodations in the US.