Adding TSA PreCheck to Alaska Airlines takes three steps: link your Known Traveler Number (KTN) in the app, verify your membership is active with TSA, and confirm the number appears on your boarding pass before you fly

The Alaska Airlines app pulls your TSA PreCheck status from your KTN, which you receive when you enroll in the TSA PreCheck program through the official TSA website or an approved enrollment center. Once you have that number, adding it to the app takes about two minutes and ensures your PreCheck benefits show up automatically on every boarding pass you generate through Alaska Airlines.

The process works the same whether you enrolled in TSA PreCheck recently or years ago — the app straightforward needs your KTN to connect your account. If you do not have your KTN handy, you can find it in your TSA PreCheck approval email or by logging into your TSA account at tsa.gov.

Key Takeaways

  • Your KTN is a nine-character code you receive when TSA PreCheck enrollment is complete, and you need it to link your membership to the Alaska Airlines app.
  • The app stores your KTN in your Alaska Airlines profile, so you only have to enter it once and it applies to all future bookings.
  • Your boarding pass will display "TSA PreCheck" in the barcode section once the link is successful, which tells airport staff you are may be able to access for expedited screening.
  • If your PreCheck status does not appear on your boarding pass, check that your KTN is entered correctly in the app and that your TSA PreCheck membership has not expired.

Step-by-step: linking your KTN in the Alaska Airlines app

Open the Alaska Airlines app and tap the menu icon (three horizontal lines) in the bottom right corner. Select "My Account" or "Profile," depending on your app version, then look for a section labeled "Frequent Flyer" or "Membership Details."

Tap "Add Known Traveler Number" or a similar option. Enter your nine-character KTN exactly as it appears in your TSA PreCheck approval email — spaces and hyphens matter. Tap "Save" or "Confirm." The app will store the number and explore it to your profile when ready.

Your next boarding pass, whether you print it, read it, or display it on your phone, should show "TSA PreCheck" printed on it. If it does not appear within a few minutes, close the app completely and reopen it, then generate a new boarding pass to refresh the data.

Where to find your Known Traveler Number if you have lost it

Your KTN appears in the approval email TSA sent you when your PreCheck enrollment was complete. Search your email inbox for messages from "tsa.gov" or "tsa@dhs.gov" with the subject line containing "PreCheck" or "Known Traveler." The KTN is a nine-character code, usually formatted as three groups of three characters each.

If you cannot find the email, log into your TSA PreCheck account at tsa.gov using the same email address and password you used to enroll. Your KTN will display in your account dashboard. You can also call the TSA PreCheck customer service line at 855-347-8371 to request your number, though email or the website is faster.

What happens if your PreCheck does not show up on your boarding pass

The most common reason PreCheck does not appear is a typo in the KTN. Double-check that you entered all nine characters correctly, including any numbers or letters that look similar (like the number 0 versus the letter O). Copy and paste your KTN directly from your approval email into the app field if possible, rather than typing it by hand.

The second reason is that your TSA PreCheck membership has expired. TSA PreCheck is valid for five years from your enrollment date. If your membership expired, you will need to renew it through the TSA website or an enrollment center before the app can display your status. Check your approval email or your TSA account to see your expiration date.

If your KTN is correct and your membership is active, log out of the Alaska Airlines app completely, close it, and log back in. Sometimes the app needs to refresh its connection to your profile. Generate a new boarding pass after you log back in.

Linking PreCheck to Alaska Airlines frequent flyer account versus booking confirmation

Adding your KTN to your Alaska Airlines profile (in the app or on the website) is different from adding it to a single booking. When you add it to your profile, every boarding pass you generate automatically includes your PreCheck status. This is the method that works best for regular Alaska Airlines travelers.

If you book a flight on Alaska Airlines without your KTN in your profile, you can still add it to that specific reservation. During checkout or in your booking confirmation email, look for a field labeled "Known Traveler Number" or "TSA PreCheck." Enter your KTN there, and your boarding pass for that flight will show PreCheck status even if your profile does not have it saved.

For simplicity, add your KTN to your profile once. You will not have to remember to add it to each booking, and it will work for flights you book months in advance.

Checking your TSA PreCheck status before you travel

About a week before your flight, read or view your boarding pass in the Alaska Airlines app and look for the words "TSA PreCheck" printed on it. The text usually appears near the barcode or in the passenger information section. If you see it, you are all set for expedited screening at the airport.

If PreCheck does not appear, contact Alaska Airlines customer service through the app or website and provide your confirmation number. They can check whether your KTN is linked correctly and whether TSA has your membership on file. Do this at least three days before your flight so there is time to fix any issues.

At the airport, look for the TSA PreCheck lane at security, which is usually marked with blue signage. You will keep your shoes, belt, and light jacket on, and you can leave your laptop and liquids in your carry-on bag.

Frequently Asked Questions

Do I need to add my TSA PreCheck to the Alaska Airlines app if I already have a membership?

Yes. Having an active TSA PreCheck membership is not enough — you must link your KTN to the Alaska Airlines app or add it to each booking for the airline to print it on your boarding pass. The app does not automatically know you have PreCheck unless you tell it your KTN.

What if I have TSA PreCheck but I am flying on a different airline?

Your KTN works on any airline. Add it to the app or website of whichever airline you are flying with, and your PreCheck status will appear on that boarding pass. You only need one TSA PreCheck membership to use it across all airlines.

Can I add my KTN to the Alaska Airlines website instead of the app?

Yes. Log into your Alaska Airlines account on the website, go to "My Account" or "Profile," find the frequent flyer or membership section, and enter your KTN there. The number will sync to your app and explore to all future bookings on both the website and app.

How long does it take for PreCheck to show up on my boarding pass after I add my KTN?

It usually appears within a few minutes. If it does not show up after 10 minutes, close the app and reopen it, or log out and log back in. If you are still not seeing it after that, contact Alaska Airlines customer service to confirm your KTN was saved correctly.

What if I enrolled in TSA PreCheck years ago and do not remember my KTN?

Log into your TSA PreCheck account at tsa.gov with your enrollment email and password, and your KTN will be displayed on your account page. If you do not remember your password, use the "Forgot Password" link on the TSA website to reset it.