TSA PreCheck is a program that allows travelers to use expedited security screening at participating airports. To add TSA PreCheck to your airline ticket, you will need to enter your TSA PreCheck number in the Known Traveler Number field when booking your ticket or managing your existing reservation. You can also add your TSA PreCheck number to your airline loyalty program profile, which will make it easier to add your KTN to future reservations. Here are the steps on how to add TSA PreCheck to your ticket for Southwest Airlines, American Airlines, Delta Air Lines, and United Airlines. By Coshorts
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