This identifier, specific to one air carrier’s frequent flyer program, can be associated with a Known Traveler Number (KTN) or redress number. When entered during flight booking, it facilitates expedited security screening through programs like TSA PreCheck. For instance, a traveler with a KTN might input this identifier to potentially enjoy faster security lines when flying that particular airline.
Inputting this information correctly ensures that TSA PreCheck benefits are consistently applied. This can lead to reduced wait times and a more streamlined airport experience. Moreover, utilizing this identifier allows for consistent application of security credentials across multiple bookings with the same airline, avoiding potential disruptions and inconveniences at the airport.