How to Add TSA Precheck to Turkish Airlines? Adding TSA Precheck to your Turkish Airlines booking requires a few simple steps. Firstly, ensure that you are enrolled in the TSA Precheck program and have received your Known Traveller Number (KTN). Next, log in to your Turkish Airlines account and navigate to your personal information page. Here, you should see a section labelled "Known Traveller Number." Input your KTN in this field and save changes. If you have already booked a flight with Turkish Airlines, contact their customer service team and provide them with your KTN to add it to the reservation manually. Keep in mind that not all Turkish Airlines flights participate in the TSA Precheck program, so it is important to check if your specific flight is eligible before making any necessary arrangements. By following these steps, you can easily add TSA Precheck to your Turkish Airlines booking for a quicker and smoother airport experience.