How do I add my Known Traveler Number (KTN) to my Delta Airlines reservation?

To add your Known Traveler Number (KTN) to your Delta Airlines reservation, you can do so during the booking process or by editing your existing reservation on the Delta website. Look for the section where you can enter your KTN, which is typically under the passenger information or traveler details. Enter your KTN accurately to ensure TSA PreCheck benefits on your boarding pass.