By enabling you to avoid lengthy security queues, Add TSA PreCheck to Delta reservation is a simple procedure that improves your travel experience. First, be sure that, following your TSA PreCheck enrollment, you have been granted a Known Traveler Number (KTN). Next, use the Delta website or mobile app to log into your SkyMiles account. Go to the “Profile” area and select “Secure Flight Information.” You have the ability to put your KTN here. After entering the number in the relevant field, save the modifications. By doing this, you can be sure that future Delta reservations will automatically include your TSA PreCheck status. You can still add your KTN if you’ve already made a reservation by going to your itinerary on the Delta website or app.