How do I add my KTN to my frequent flyer profile on one of the participating airline?

Ask your airline(s) to update your profile information and/or saved Secure Flight data. By updating your airline profile, you still have to notify your airline to make sure your KTN/Secure Flight data is in each reservation correctly, with the same information used when applying for one of the trusted traveler programs. Some airlines may need proof of your full name to make changes to your frequent flyer profile. Please contact your airline directly for more information. Updating your frequent flyer profile will not automatically update any previous reservations.