Add Your TSA PreCheck Number to Delta During Booking or in Your Profile

You add your TSA PreCheck number to Delta by entering it in your passenger profile or during the flight booking process. Delta calls this your Known Traveler Number (KTN). Once you add it, the number stays in your account and appears automatically on future bookings—you do not have to re-enter it each time.

The fastest way is to add it to your profile before you book. This takes about two minutes and means every reservation you make will include the number. If you have already booked a flight without it, you can add the KTN to that specific booking up until 24 hours before departure.

Key Takeaways

  • Your TSA PreCheck confirmation number is your Known Traveler Number (KTN), and Delta needs it to show TSA PreCheck on your boarding pass.
  • Add your KTN to your Delta profile under "Passenger Information" or "Known Traveler Number" so it carries forward to all future bookings.
  • If you have already booked a flight, you can add your KTN to that reservation through "Manage My Booking" up to 24 hours before departure.
  • Your TSA PreCheck number is a nine-character code that begins with letters or numbers; it appears on your TSA PreCheck card and in your TSA account.

Find Your TSA PreCheck Number Before You Start

Your TSA PreCheck number is printed on the back of your TSA PreCheck card, usually in the upper right corner. It is a nine-character code—for example, "ABC123XYZ". If you do not have your card in front of you, you can also find the number by logging into your TSA account at tsa.gov.

Go to tsa.gov, click "Sign In" at the top right, and use your login credentials. Once you are logged in, your Known Traveler Number will appear on your account dashboard. Write it down or have it ready before you open Delta's website or app.

Add Your KTN to Your Delta Profile

Log into your Delta account on delta.com or the Delta app. Click on your name or profile icon, usually in the top right corner, and select "My Profile" or "Profile Settings." Look for a section labeled "Passenger Information," "Known Traveler Number," or "TSA PreCheck."

Click the field and enter your nine-character TSA PreCheck number exactly as it appears on your card. Do not add spaces or dashes. Save the changes. Delta will confirm that the number has been added to your profile. From now on, this number will appear on every boarding pass you receive from Delta, as long as you are logged into the same account when you book.

Add Your KTN to an Existing Booking

If you have already booked a Delta flight and did not include your TSA PreCheck number, you can add it through "Manage My Booking." Go to delta.com, click "Manage My Booking," and enter your confirmation number and last name. Find your reservation and look for an option to edit passenger details or add a Known Traveler Number.

Enter your nine-character TSA PreCheck number and save. You must do this at least 24 hours before your flight departs. Once you save the change, your updated boarding pass will reflect your TSA PreCheck status. You can print a new boarding pass or use the mobile boarding pass in the Delta app.

What Happens After You Add Your KTN

After your TSA PreCheck number is linked to your Delta booking, "TSA PreCheck" will appear on your boarding pass. At the airport, this tells TSA agents that you have already been vetted and are may be able to access for expedited screening. You will be directed to a dedicated TSA PreCheck lane where you can keep your shoes, belt, and light jacket on, and leave your laptop and liquids in your bag.

The TSA PreCheck benefit applies only to flights departing from U.S. airports. If you are flying internationally, the benefit applies to the U.S. leg of your journey. Make sure your TSA PreCheck membership is current—it is valid for five years from the date you were approved. If your membership has expired, you will need to renew it through TSA before the benefit will work again.

Troubleshoot If Your KTN Does Not Appear on Your Boarding Pass

If you added your TSA PreCheck number to your Delta profile but it does not show on your boarding pass, check that you entered the number correctly—no spaces, no dashes, exactly as it appears on your card. Log back into your profile and verify the entry. If the number is correct, wait a few hours and check again, as Delta's system sometimes takes time to sync.

If the number still does not appear, contact Delta customer service before you go to the airport. You can call 1-800-221-1212 or use the chat feature in the Delta app. Have your confirmation number and TSA PreCheck card ready. If your TSA PreCheck membership has expired, Delta cannot display it on your boarding pass—you will need to renew your TSA PreCheck through tsa.gov first.

Frequently Asked Questions

Can I add my TSA PreCheck number after I have already checked in?

No. You must add your KTN before you check in for your flight. If you have already checked in, you cannot add it to that booking. For future flights, add it to your profile or during the booking process before check-in opens (usually 24 hours before departure).

What if I have TSA PreCheck but Delta does not show it on my boarding pass?

First, verify that your TSA PreCheck membership is still active—it expires five years after approval. Then check that you entered your nine-character KTN correctly in your Delta profile with no spaces or dashes. If both are correct, contact Delta customer service to confirm the number is saved to your account.

Do I need to add my TSA PreCheck number to Delta every time I book a flight?

No. Once you add your KTN to your Delta profile, it will appear on all future bookings made from that account. You only need to enter it once. If you book through a travel agent or third-party website, you may need to add it separately to that specific reservation.

Is my TSA PreCheck number the same as my Known Traveler Number?

Yes. TSA PreCheck is the program, and your Known Traveler Number (KTN) is the nine-character code that identifies you within that program. Delta uses the term "Known Traveler Number" on its website and app, but it is the same number printed on your TSA PreCheck card.