Adding TSA PreCheck to Delta: The Basic Steps

To add your TSA PreCheck number to the Delta app, open the app, tap the menu icon (three horizontal lines), select "My Profile," then "Frequent Flyer," and look for a section labeled "Known Traveler Number" or "KTN." Enter your nine-digit TSA PreCheck number there, save it, and it will attach to your Delta SkyMiles account. The next time you book a flight on Delta, your PreCheck status should appear automatically on your boarding pass.

The process takes about two minutes. Your TSA PreCheck number stays linked to your account, so you only have to enter it once. If you have not yet received your TSA PreCheck number, you will need to complete that process separately through the TSA before you can add it to Delta.

Key Takeaways

  • Your TSA PreCheck number is a nine-digit code that you receive when you complete TSA PreCheck enrollment; it is not something Delta issues.
  • Adding your number to the Delta app takes two minutes and requires only your TSA PreCheck number and your Delta SkyMiles login.
  • Once linked, your PreCheck status will print on every Delta boarding pass you generate through the app or website.
  • If your number does not appear on your boarding pass after you add it, contact Delta customer service to verify the link was saved correctly.

Where to Find Your TSA PreCheck Number

Your TSA PreCheck number is printed on the back of your Known Traveler Number card, which TSA mails to you after you complete enrollment and pay the fee. The number is nine digits long and appears in the upper right corner of the card. If you have lost the card, you can also find your number by logging into your TSA PreCheck account at tsa.gov and viewing your enrollment details.

Do not confuse your TSA PreCheck number with your driver's license number or passport number. The TSA PreCheck number is unique to your PreCheck enrollment and is what Delta needs to link to your account. If you cannot locate it, contact TSA directly at 1-855-347-8371 before attempting to add it to Delta.

Step-by-Step: Adding Your Number in the Delta App

Open the Delta app and log in with your SkyMiles username and password. Tap the menu icon (three horizontal lines) at the bottom right of the screen. Select "My Profile" from the menu options. Tap "Frequent Flyer" to expand that section. Look for a field labeled "Known Traveler Number," "KTN," or "TSA PreCheck Number"—the exact label varies slightly depending on your app version.

Enter your nine-digit TSA PreCheck number in that field. Double-check that you have typed it correctly, as a single wrong digit will prevent PreCheck from appearing on your boarding pass. Tap "Save" or "Update." The app will confirm that your number has been saved. You can now close the profile section and return to booking flights.

Verifying Your PreCheck Appears on Your Boarding Pass

The easiest way to confirm the link worked is to book a test flight or look at a recent booking in the Delta app. Open your upcoming trip, tap "View Boarding Pass," and look at the top or bottom of the pass. If your TSA PreCheck number was added correctly, you will see "TSA PreCheck" or your KTN printed on the pass. Some versions of the pass show it prominently; others print it in smaller text near the barcode.

If you do not see PreCheck on your boarding pass after adding your number, wait a few hours and check again—the system sometimes takes time to sync. If it still does not appear after 24 hours, contact Delta customer service. They can verify that your number was saved to your account and troubleshoot any technical issues on their end.

Adding Your Number on Delta.com Instead of the App

If you prefer to add your TSA PreCheck number on a computer, you can do so through Delta.com. Log in to your SkyMiles account, click "My Profile" in the top right corner, then select "Frequent Flyer Information." Look for the "Known Traveler Number" field and enter your nine-digit TSA PreCheck number. Click "Save Changes." The number will sync to your Delta app within a few minutes.

The process is identical whether you use the app or the website. Your TSA PreCheck number is stored in your SkyMiles account itself, not in the app, so adding it in one place updates it everywhere. If you have multiple devices or use both the app and website, you will see the same number reflected on all of them.

What Happens If You Update or Renew Your TSA PreCheck

TSA PreCheck is valid for five years. When your enrollment is about to expire, TSA will send you a renewal notice. If you renew your TSA PreCheck, you will receive a new card with a new nine-digit number. You will need to update your Delta account with the new number to keep PreCheck active on your boarding passes.

Log back into the Delta app or Delta.com, go to your profile, and replace the old TSA PreCheck number with the new one. Save the change. Your new PreCheck status will appear on all future boarding passes. If you do not update the number after your TSA PreCheck expires, Delta will no longer print PreCheck on your passes, and you will not have access to PreCheck lanes at security.

Troubleshooting: PreCheck Not Showing on Your Boarding Pass

If you have added your TSA PreCheck number to Delta but it is not appearing on your boarding pass, start by confirming you entered the number correctly. Log back into your profile and verify that the nine digits match exactly what is on your TSA PreCheck card. A typo in even one digit will cause the system to reject it.

Next, check that your TSA PreCheck enrollment is still active. Visit tsa.gov, log into your account, and confirm that your enrollment has not expired and that your status shows as "Approved." If your enrollment has expired, you will need to renew it with TSA before PreCheck will work with any airline. If your enrollment is active and your number is correct in Delta's system, contact Delta customer service—there may be a technical issue on their end that requires manual intervention.

Frequently Asked Questions

Do I need TSA PreCheck to fly Delta?

No. TSA PreCheck is optional and costs a fee to enroll. You can fly Delta without it. PreCheck straightforward allows you to use a faster security line at participating airports and keep some items on during screening. If you fly frequently, the cost may be worth it; if you fly rarely, it may not be.

Can I add someone else's TSA PreCheck number to my Delta account?

No. Your TSA PreCheck number must match the name on your ticket and ID. If you are booking a flight for a family member, they need to add their own TSA PreCheck number to their own SkyMiles account. Each person traveling needs their own PreCheck enrollment and their own number linked to their own airline account.

What if I do not have a SkyMiles account yet?

Create a free SkyMiles account on Delta.com or in the Delta app before you try to add your TSA PreCheck number. You will need to log in with a SkyMiles username and password to access your profile. Once your account is set up, follow the steps above to add your number.

Will my TSA PreCheck work on other airlines if I add it to Delta?

Yes, but you have to add it separately to each airline's app or website. Your TSA PreCheck number is issued by the government and works at all participating airports and airlines. However, each airline stores it in its own system, so you will need to enter it into American, United, Southwest, and any other airline you fly with. The process is the same for each one.

What if my boarding pass does not print my TSA PreCheck number at the airport kiosk?

If you added your number to Delta but the kiosk does not print it on your boarding pass, show the agent your TSA PreCheck card. They can manually add it to your pass or direct you to the PreCheck security line. This sometimes happens if there is a delay in the system syncing, but your enrollment is still valid and you can still use PreCheck screening.