a white airplane at an airport
Photograph ©2025 by Brian Cohen.

Have You Experienced This “Bug”? Known Traveler Number Would Not Appear On My Boarding Pass

This experience was irritating, annoying, unnecessary, and avoidable.

Have you experienced this “bug”? My Known Traveler Number would not appear on my boarding pass for my flight today to New York, which was operated by Delta Air Lines.

Have You Experienced This “Bug”? Known Traveler Number Would Not Appear On My Boarding Pass

In order to be eligible to use the TSA Pre✓ line at the airport security checkpoint, the boarding pass must have some form of official designation on it, as shown in my electronic boarding passes below.

screens screenshot of a flight schedule
Source: Delta Air Lines.

The boarding pass on the right in the screen shot shown above has the TSA Pre✓ designation on it; whereas the one on the left does not.

How did the boarding pass finally get to that point?

I did not change my profile with Delta Air Lines at all since I added my Known Traveler Number to it — and I have used it successfully multiple times prior to this flight…

…but when I saw last night that my known traveler number was not on my boarding pass, I first tried to add it myself. Whether via laptop computer or mobile telephone, I was unsuccessful in adding it — even though my profile was correct when I double checked it.

I then sent a text to Delta Air Lines via social media; but I did not receive a response after waiting for a while — so I called Delta Air Lines. After waiting six minutes — I expected the wait to be much longer — the customer service agent told me that Delta Air Lines was experiencing a “bug” in its information technology in recent weeks with which other customers were having similar issues. “But don’t worry,” he reassured me, “as when you use one of the kiosks at the airport, the boarding pass will print with TSA Pre✓ on it.”

It did not; so after I used the kiosk at the airport this morning, a customer service agent of Delta Air Lines tried using a kiosk for me.

She was unsuccessful as well.

I was then directed to a line for customer service. After waiting several minutes, a rather terse agent who acted like she did not even want to be there blamed my profile for being incorrect, as the year was wrong. “You must change it on your computer,” she told me. “You can’t change it on your phone.”

None of what she said made any sense to me; but I went ahead and logged onto my profile on my laptop computer — where of course everything was correct.

I went back to the line and waited for my turn. I told a different customer service agent what happened. She tinkered around on her computer for a few minutes; told me to log out on my mobile telephone; and then log back in again.

Voilà! The TSA Pre✓ designation was finally on my boarding pass.

Final Boarding Call

I have no idea what happened or the reasons why what happened happened; but getting the issue resolved was not quick or easy…

…so I am wondering if you know what happened — as well as whether or not it happened to you. I found the experience to be irritating, annoying, unnecessary, and avoidable.

I also still have no idea why passengers can no longer use their SkyMiles membership numbers to access their reservations and check in for their flights on the kiosks that are provided by Delta Air Lines…

Photograph ©2025 by Brian Cohen.

  1. I assume that when you say KTN you mean the TSA Pre designator. I’ve never seen my actual KTN on the boarding pass.

    I did have something interesting happen yesterday. The Clear agent encouraged me to use the Digital ID lane instead of Clear at Reagan National. If Digital is going to be at every airport, I don’t see much of a future for Clear, especially if Clear themselves are sending people there!

    1. The Known Traveler Number applies for Global Entry, NEXUS, SENTRI, and TSA Pre✓, Barry Graham — but yes, I meant the designator itself.

      I really never understood Clear — especially after TSA Pre✓. I could get it for free if I wanted and I am still not interested. The TSA Pre✓ line almost always seems to go faster than the Clear line…

  2. Yes. In Boston last year. I went through the standard lanes. When the TSA Officer scanned my boarding pass, she asked if I knew that I was Pre Check. Since I was akready there, she just gave me a card for my shoes. Usually, I only have problems with B6 and AC accepting it because my KTN is 10 numbers instead of the standard 9 letters and numbers. I have to call in and have it manually added.

      1. United. No indication on BP but it was apparently in the system. It’s happened to me once before on AS about 5 years ago.

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