TSA PreCheck to your United Airlines profile, log in to your United account on their website or app. Go to “Account” and select Profile or Travel Documents. Enter your TSA PreCheck Known Traveler Number (KTN) in the How Do You Add TSA PreCheck to United Airlines designated field and save the changes. Ensure your KTN is correctly linked to your bookings for TSA PreCheck benefits.
In order to apply TSA PreCheck to your reservation, begin by logging into your MileagePlus account on the United Airlines webpage. Select the Profile area and then enter your Known Traveler Number (KTN) under Personal Information. Add your KTN and save the changes if it isn't there already. How Do You Add TSA PreCheck to United Airlines.