Flights departing to the United States will clear U.S. Customs andBorder Protection in Toronto. This means you arrive in the United States as adomestic passenger. The hours of operation for pre-clearance in both terminalsare 0330-2100 daily. Should you have any questions related to travel into theUnited States (i.e. documentation/visa requirements, plant/animal or foodrestrictions) you may reach their Info Centre at 1-202-325-8000 or through thefollowing link: https://help.cbp.gov/app/home/noIntercept/1