Add your TSA PreCheck number to Delta after you book by going to Manage My Booking, finding your confirmation number, and entering your Known Traveler Number in the passenger details section.

You do not have to rebook your flight. Delta lets you update your reservation with your TSA PreCheck information at any point before you check in — even the day of your flight. The process takes about two minutes and applies to all passengers on your booking who have their own TSA PreCheck number.

If you have not yet enrolled in TSA PreCheck, you will need to complete that process first through the TSA's official enrollment system. Once you have your Known Traveler Number (KTN), you can add it to any existing Delta reservation.

Key Takeaways

  • You can add your TSA PreCheck number to a Delta booking after you purchase your ticket without changing your flight or paying a fee.
  • Your Known Traveler Number must be entered in Delta's Manage My Booking section under passenger details, not in a separate field.
  • Each passenger on your reservation needs their own TSA PreCheck number if they want to use the benefit on that flight.
  • Adding your number before check-in ensures TSA PreCheck appears on your boarding pass at the airport.

Where to find Manage My Booking on Delta's website

Go to delta.com and look for the "Manage My Booking" link on the homepage. It is usually in the top navigation bar or under a "Book" or "Trips" section. Click it and enter your confirmation number (the six-character code from your booking confirmation email) and your last name.

Delta will pull up your reservation. You should see all passengers listed with their names and seat assignments. Next to each passenger name, there will be an option to edit or update their information. Click on the passenger whose TSA PreCheck number you want to add.

How to enter your Known Traveler Number

Once you open a passenger's details, look for a field labeled "Known Traveler Number" or "KTN". This is where you paste or type your TSA PreCheck number. Your KTN is a nine-character code that the TSA issued when you enrolled. Do not confuse it with your TSA PreCheck membership number or your confirmation number from enrollment.

Enter the number exactly as it appears in your TSA PreCheck enrollment confirmation. After you type it in, save the changes. Delta will update your reservation when ready. You do not need to confirm anything else or contact Delta customer service.

What happens if you add your number too late

If you add your TSA PreCheck number after you have already checked in online or at the airport, it will not appear on your boarding pass for that flight. The TSA PreCheck indicator prints on your boarding pass when you check in, and it pulls the information from what Delta has on file at that moment.

If you realize you forgot to add your number before checking in, you can still go through TSA PreCheck screening at the airport if you have your TSA PreCheck card or your enrollment confirmation with you. The TSA officer can manually verify your status. However, adding your number before you check in is the most straightforward way to may support the benefit shows on your boarding pass.

Adding TSA PreCheck for multiple passengers

If you booked a flight for several people, each passenger needs their own TSA PreCheck number to use the benefit on that reservation. Go through the Manage My Booking process for each person separately and enter their individual KTN in their passenger details.

Family members or travel companions who do not have TSA PreCheck do not need a number. They will go through standard security screening while you use the PreCheck lane. You can have a mixed group on one booking — some with TSA PreCheck and some without.

If you cannot find the Known Traveler Number field

On older or simplified booking pages, the KTN field may not be visible at first. Try clicking "Edit Passenger Details" or "Add Special Information" rather than just the passenger name. Some versions of Delta's website group the KTN field under a section called "Frequent Flyer and Other Information."

If you still cannot locate it after checking those sections, you can call Delta customer service at 1-800-221-1212 and provide your confirmation number. A representative can add your TSA PreCheck number to your reservation over the phone. This takes a few minutes but is a reliable backup if the website is not cooperating.

Checking that your number was added correctly

After you save your changes, go back to Manage My Booking and pull up your reservation again. Your passenger details should now show your Known Traveler Number. If it does not appear after a few minutes, try refreshing the page or clearing your browser cache and logging back in.

When you check in for your flight — whether online, at a kiosk, or at the counter — your boarding pass should print with "TSA PreCheck" or a TSA logo in the upper right corner. If it does not, show the TSA officer your TSA PreCheck card or enrollment confirmation at security, and they can process you through the PreCheck lane anyway.

Frequently Asked Questions

Can I add TSA PreCheck to a Delta flight I booked through a travel website or airline partner?

If you booked through a third-party site like Expedia or Kayak, you will need to add your TSA PreCheck number through Delta's Manage My Booking system using your confirmation number. The confirmation number should be the same regardless of where you booked. If the system does not recognize your booking, contact the website where you purchased the ticket for your Delta confirmation number.

What if I do not have my Known Traveler Number yet?

You must enroll in TSA PreCheck through the TSA's official enrollment system before you can add it to your Delta booking. Visit tsa.gov/precheck to find an enrollment center near you or to schedule an appointment. Enrollment takes about 10 to 15 minutes in person and costs a fee. Once approved, you will receive your KTN by email or mail.

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

Yes, you need to add your KTN to each individual booking. However, if you link your Delta SkyMiles frequent flyer account to your TSA PreCheck enrollment, Delta may automatically populate your KTN on future bookings. Check your SkyMiles account settings to see if this option is available.

What if I add the wrong number by mistake?

Go back to Manage My Booking, pull up your reservation, and edit the passenger details again. Delete the incorrect number and enter the correct one. Save the changes. There is no penalty for correcting it, and you can do this as many times as you need before your flight.

Will adding TSA PreCheck change my seat or flight time?

No. Adding your Known Traveler Number only updates your passenger information. It does not change your seat assignment, flight time, or any other part of your reservation. Your flight details stay exactly the same.