Air Canada for visitors who meet the requirements, Air Canada TSA PreCheck provides TSA PreCheck, which expedites and streamlines the security screening process at U.S. airports. Passengers can avoid the standard security lines using TSA PreCheck and keep their belts, shoes, and lightweight jackets on. Liquids and computers may also be carried on in carry-on luggage. When making a reservation or accessing their frequent flyer profile, customers using Air Canada must provide their Known Traveler Number (KTN) in order to use TSA PreCheck. Airports in the United States can use this service, but airports in Canada are not covered. For frequent travelers who want to speed through security checks and feel less stressed, TSA PreCheck is great.