Your Guide to Known Traveler Numbers and TSA PreCheck Access

A Known Traveler Number is a nine-digit code issued by the Department of Homeland Security to members of TSA PreCheck, Global Entry, and other Trusted Traveler Programs. This unique identifier proves your vetted status and grants access to expedited TSA PreCheck screening lanes at U.S. airports. Adding your KTN to flight reservations ensures your boarding pass displays the TSA PreCheck designation.

A Known Traveler Number serves as official documentation from the Department of Homeland Security that a traveler has completed the vetting required by federal security programs. Members of TSA PreCheck, Global Entry, and related initiatives receive this identifier upon approval, which remains active for five years before renewal becomes necessary. The screening process for these programs includes both an application submission and an in-person interview, often conducted at airport enrollment centers across the country.

The primary advantage of obtaining a KTN lies in expedited airport security screening. Travelers who add their number to flight bookings ensure their boarding pass reflects their PreCheck eligibility, allowing them to use dedicated screening lanes with typically shorter queues. Global Entry members gain additional benefits through expedited customs processing upon return to the U.S., making the higher membership cost potentially worthwhile for frequent international travelers.