Yes — add your Known Traveler Number (KTN) to your American Airlines profile or to the specific trip. American Airlines says you can update an existing trip by opening it on aa.com or in the app, choosing Edit in passenger information, going to Security information , and entering your KTN or PASS ID; you can also save it in your AAdvantage account so it applies to future bookings.

Fast steps

  1. Log in to your American Airlines account.
  2. Open your profile or the trip you want to update.
  3. Find Security information or Information and Password.
  4. Enter your KTN or PASS ID.
  5. Save the changes and recheck your boarding pass so TSA PreCheck shows up.

What to watch for

If you add the number after checking in, you may need to refresh or reprint your boarding pass for the TSA PreCheck indicator to appear. If the number is saved in your profile, it is more likely to carry over automatically to future bookings.

If it still does not show

Make sure the name on your AAdvantage account and your TSA PreCheck enrollment match exactly, and confirm the trip uses the same frequent flyer profile where the KTN was added. If the boarding pass still does not show TSA PreCheck after updating, the usual fix is to re-open the reservation and verify the security info field was saved correctly.

TL;DR: put your KTN in your AA profile or the reservation’s Security information area, save it, then refresh your boarding pass.