Can You Add a Known Traveler Number (KTN) After Checking In with Frontier Airlines?
Learn how to add your Known Traveler Number (KTN) at the airport after checking in with Frontier Airlines to ensure TSA PreCheck benefits on your boarding pass.
Learn how to add your Known Traveler Number (KTN) at the airport after checking in with Frontier Airlines to ensure TSA PreCheck benefits on your boarding pass.