A Known Traveler Number (KTN) is a unique identifier assigned to pre-approved, low-risk travelers by U.S. Customs and Border Protection (CBP). For instance, Sarah, a frequent international traveler, can apply for a KTN to streamline her airport experience.
KTNs expedite airport security and immigration processes, offering shorter wait times and enhanced travel convenience. This initiative emerged after 9/11 to improve border security while facilitating efficient travel.