Air Canada Tsa Precheck As a participant in TSA PreCheck, Air Canada offers qualified travelers a quicker and more effective security screening process at U.S. airports as well as some Canadian airports that have U.S. preclearance capabilities. Travelers can utilize designated lanes using TSA PreCheck and avoid having to take off their shoes, belts, laptops, and liquids while undergoing security inspections. Passengers must submit their Known Traveler Number (KTN) when making their reservation, or add it later, in order to take advantage of these services. This tool makes traveling easier overall by streamlining and speeding up airport processes.