How Do You Add TSA PreCheck to Turkish Airlines :You must confirm that your Turkish Airlines reservation has your Known Traveler Number (KTN) accurately in order to join TSA PreCheck. You can accomplish this by getting in touch with Turkish Airlines directly or by using the manage booking feature of their website. Your Turkish Airlines flights should automatically qualify for TSA PreCheck advantages once your KTN is linked, which will speed up the security check process at participating US airports.