Add TSA PreCheck to Delta in three steps

To add your TSA PreCheck number to the Delta app, open the app, tap the menu icon, select "Manage my booking" or go to your profile settings, find the "Known Traveler Number" field, and enter your TSA PreCheck number exactly as it appears on your card. Delta will store this information and display it on your boarding pass at check-in. The process takes about two minutes and works on both iPhone and Android.

Once your TSA PreCheck number is linked, it will appear on every boarding pass you generate through the Delta app for flights you book under that same name. You do not need to add it separately for each flight — Delta saves it to your account.

Key Takeaways

  • Your TSA PreCheck number must match your full name exactly as it appears on your government ID and airline reservation.
  • The Delta app stores your number in your profile, so you only enter it once and it carries forward to all future bookings.
  • Your TSA PreCheck number appears on your boarding pass at the airport, which tells TSA agents you are enrolled in the program.
  • If you do not see the Known Traveler Number field in your Delta profile, check that you are logged into the correct account.

Where to find the Known Traveler Number field in Delta

Open the Delta app and tap the menu icon (three horizontal lines) in the bottom right corner. Select "My profile" or "Account settings" depending on your app version. Scroll down until you see "Known Traveler Number" or "TSA PreCheck" — the label varies slightly between iOS and Android, but the field is in the same section as your frequent flyer number and emergency contact information.

If you cannot find this field, make sure you are logged into your Delta SkyMiles account. Guests who book without creating an account will not see this option. You can create a free SkyMiles account on the Delta website or in the app before your flight.

What your TSA PreCheck number looks like

Your TSA PreCheck number is a 10-digit code printed on your TSA PreCheck card, usually in the upper right corner. It starts with numbers and may include letters. Enter it exactly as printed — do not add spaces, dashes, or extra characters. If you have lost your card, you can find your number by logging into your TSA account at tsa.gov or calling the TSA at 1-855-347-8371.

Make sure the name on your TSA PreCheck enrollment matches the name on your airline ticket. If your name has changed since you enrolled in TSA PreCheck, you will need to update your TSA account first before Delta can link the numbers correctly.

When your TSA PreCheck number appears on your boarding pass

Once you have added your TSA PreCheck number to Delta, it will show on your mobile boarding pass in the app and on any paper boarding pass you print at home or at the airport. At the security checkpoint, TSA agents scan your boarding pass and see that you are enrolled in PreCheck, which allows you to use the expedited security lane.

The number appears automatically on every boarding pass for flights booked under the same name and SkyMiles account. You do not need to do anything else — Delta handles this part for you.

Troubleshooting if your number does not save

If you enter your TSA PreCheck number and it does not save, first check that you typed it correctly with no extra spaces or characters. Then close the Delta app completely and open it again. If the field is still blank, try logging out of your account, closing the app, and logging back in.

If the problem continues, clear the app's cache by going to your phone's Settings, finding the Delta app, and selecting "Clear Cache" (Android) or "Offload App" and then reinstall it (iPhone). Contact Delta customer service at 1-800-221-1212 if the field still will not accept your number — they can add it to your account manually.

Adding TSA PreCheck if you booked through a third-party website

If you booked your Delta flight through a travel website like Kayak, Expedia, or Google Flights, you can still add your TSA PreCheck number to Delta. Log into your Delta SkyMiles account on the Delta website or app, find your reservation under "My trips," and add your number there. Delta will use this information for your boarding pass even though you did not book directly with them.

Make sure the name on your third-party booking matches the name on your TSA PreCheck enrollment and your government ID. If the names do not match, contact the website where you booked to correct it before adding your TSA number to Delta.

Frequently Asked Questions

Do I need TSA PreCheck to use the Delta app?

No. The Delta app works for all passengers. Adding your TSA PreCheck number is optional and only useful if you are enrolled in the TSA PreCheck program. If you do not have TSA PreCheck, you can still use the app to book flights, check in, and view your boarding pass.

Will adding my TSA PreCheck number to Delta cost me anything?

No. Linking your number in the app is free. You pay for TSA PreCheck enrollment separately (currently $78 to $85 for five years) through tsa.gov, not through Delta or the app.

Can I add TSA PreCheck to Delta on the website instead of the app?

Yes. Log into your SkyMiles account on delta.com, go to your profile settings, and enter your Known Traveler Number in the same field. The information syncs across the website and app, so you only need to enter it once.

What happens if I enter the wrong TSA PreCheck number?

TSA agents will not recognize you as enrolled in PreCheck and you will go through standard security screening. You can update your number in the Delta app at any time. The next boarding pass you generate will show the corrected number.

Does my travel companion's TSA PreCheck number need to be added to my Delta account?

No. Each person traveling needs their own SkyMiles account with their own TSA PreCheck number added. You can book multiple passengers on one reservation, but each person must have their number in their own account for it to appear on their boarding pass.