Add Your TSA PreCheck Number During Booking or in Your Profile

You add your TSA PreCheck number to Alaska Airlines in two places: when you book a flight, or in your frequent flyer account before you book. The airline uses this number to print it on your boarding pass, which tells TSA screeners at the airport that you have PreCheck and can use the expedited lane.

If you book through Alaska Airlines' website or mobile app, you will see a field for "Known Traveler Number" (KTN) during checkout. Enter your TSA PreCheck number there. If you add it to your profile first, the airline will fill it in automatically on every future booking.

Your TSA PreCheck number is a 10-digit code that begins with your program type — usually "TSA" for standard PreCheck. You received this number in your approval letter from TSA, or you can find it on your PreCheck card itself.

Key Takeaways

  • Your TSA PreCheck number is a 10-digit code that starts with "TSA" and appears on your PreCheck card and approval letter.
  • You can enter your number during flight booking on Alaska Airlines' website or app, or add it to your frequent flyer profile so it appears on all future bookings.
  • The number must match the name on your ticket exactly, or TSA will not recognize it at the airport.
  • If you do not add your number before you travel, you can still contact Alaska Airlines to add it to a past booking, though the boarding pass may not print with the indicator.

Add Your Number to Your Mileage Plan Profile

Log into your Alaska Airlines Mileage Plan account on the airline's website. Go to "My Profile" or "Account Settings" and look for a section called "Travel Information" or "Known Traveler Number." Enter your 10-digit TSA PreCheck number in that field and save.

Once you save it, Alaska Airlines will automatically include your number on every boarding pass you print or receive by email for flights booked under that account. This is the fastest way if you fly Alaska Airlines regularly, because you only enter it once.

Make sure the name on your Mileage Plan account matches the name on your TSA PreCheck approval letter and your ID exactly. If the names do not match, TSA will not recognize your PreCheck status at the airport, even if the number is correct.

Enter Your Number During Online Checkout

When you book a flight on Alaska Airlines' website or mobile app, you will reach a page that asks for passenger details. Below the name and date of birth fields, you will see "Known Traveler Number (KTN)" or "TSA PreCheck Number." Type your 10-digit number there.

If you have already added your number to your Mileage Plan profile, this field will auto-fill. If you have not, you can enter it here for that single booking. The number will print on your boarding pass and tell TSA screeners you have PreCheck.

Double-check that you entered the number correctly before you confirm your booking. A typo will mean TSA does not see your PreCheck status, and you will go through standard security screening at the airport.

What Happens at the Airport With Your Number on Your Boarding Pass

When you arrive at the airport, TSA screeners scan your boarding pass. If your TSA PreCheck number printed correctly, the scanner will show them that you have PreCheck status. You can then proceed to the TSA PreCheck security lane, where you keep your shoes, belt, and light jacket on, and leave your laptop and liquids in your bag.

If your number did not print on your boarding pass — because you forgot to add it during booking — you will go through standard security screening. You cannot use the PreCheck lane without the indicator on your pass, even if you have a valid PreCheck card.

Some airports have TSA PreCheck lanes only at certain terminals or times of day. Check the TSA website for your airport before you travel to see where the PreCheck screening is located.

Fix a Booking That Does Not Have Your Number

If you already booked a flight and forgot to add your TSA PreCheck number, contact Alaska Airlines before your travel date. Call their reservations line at 1-800-252-7522 or use the "Manage My Booking" tool on their website to add it to an existing reservation.

Alaska Airlines can usually add your number to a past booking, but the boarding pass may not reprint with the PreCheck indicator unless you request a new one. Ask the agent to confirm that your number will appear on the boarding pass you receive at the airport or print at home.

If you are within 24 hours of your flight, call the airline directly rather than using the website tool, because phone agents can make changes faster and confirm the update when ready.

Verify Your Number Matches Your ID and Ticket Name

TSA will only recognize your PreCheck status if three things match exactly: your TSA PreCheck number, the name on your boarding pass, and the name on your ID. If you changed your name since you got PreCheck, or if you booked your ticket under a nickname, the system will not connect them.

Check your TSA PreCheck approval letter or card to see the exact name TSA has on file. Make sure your Alaska Airlines ticket is booked under that same name, with the same spelling and middle initial. If they do not match, contact Alaska Airlines to correct your ticket name before you travel.

If your name has changed since you got PreCheck, you will need to update your PreCheck record with TSA before your flight. You can do this at a TSA PreCheck enrollment center or by mail — contact TSA directly to start that process.

Frequently Asked Questions

What if I have TSA PreCheck but I do not see a field for it when I book Alaska Airlines?

The Known Traveler Number field appears on most Alaska Airlines bookings, but it may be hidden under "Additional Information" or "Passenger Details" depending on which device or browser you use. Try scrolling down on the passenger information page, or log into your Mileage Plan account and add it there instead — it will then appear on all future bookings automatically.

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

No. TSA reads your PreCheck status from your boarding pass at the security checkpoint, so the number must be on the pass before you arrive at the airport. If you forgot to add it, you will go through standard screening. For future flights, add your number to your Mileage Plan profile so it appears automatically.

Do I need to add my TSA PreCheck number to Alaska Airlines every time I book?

No. If you add your number to your Mileage Plan profile once, Alaska Airlines will include it on every boarding pass you receive for flights booked under that account. You only need to enter it manually if you book as a guest without logging into your Mileage Plan account.

What if my TSA PreCheck number is different from my Known Traveler Number?

Your TSA PreCheck number and your Known Traveler Number are the same thing — "Known Traveler Number" is just what airlines call it. Enter the 10-digit code from your PreCheck card or approval letter in the KTN field. If you have other trusted traveler programs like Global Entry, you may have multiple numbers; use your TSA PreCheck number for Alaska Airlines.

Will adding my TSA PreCheck number to Alaska Airlines change my frequent flyer benefits?

No. Your TSA PreCheck number is separate from your Mileage Plan account and does not affect your miles, elite status, or any other benefits. It only tells TSA screeners that you have PreCheck status so you can use the expedited security lane.