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How to Add Your Known Traveler Number to an Existing Reservation

Published:

Modified: 5 October 2026

by Maisie Sommer

How to Add Your Known Traveler Number to an Existing Reservation

You can add your Known Traveler Number (KTN) to an existing reservation by logging into the airline’s website, using its mobile app, or calling customer service. For Global Entry members, use your PASSID as your KTN in the reservation.

Understanding the Known Traveler Number

A Known Traveler Number (KTN) helps you access programs like TSA PreCheck, and Global Entry members can use their PASSID as their KTN. If you already booked your flight and forgot to add it, updating your reservation is straightforward.

Check Your Airline’s Policy

Different airlines have different ways to update your reservation. Here’s how you can find out what your airline prefers:

  • Visit the Airline’s Website
    Most airlines have a section for managing reservations. Look for options like “Manage Booking” or “My Trips.” This is where you can usually add your KTN.
  • Contact Customer Service
    If you can’t find the option online, call customer service. They can guide you through the process or add the KTN for you.
  • Use the Airline’s App
    Many airlines offer mobile apps with features similar to their websites. Check if you can update your reservation through the app.

Adding Your KTN Online

Once you know your airline’s policy, adding your KTN online is often the quickest method. Here’s how to do it:

  • Log Into Your Account
    Use your credentials to access your account on the airline’s website. If you don’t have an account, you might need to create one.
  • Find Your Reservation
    Navigate to the section where your bookings are listed. Select the reservation you want to update. If you booked through a third party, you may need to locate my reservation on Expedia or use that site’s “modify reservation on Expedia” feature.
  • Enter Your KTN
    Look for a field labeled “Known Traveler Number” or “TSA PreCheck.” Enter your KTN and save the changes.

Calling Customer Service

Sometimes, online options aren’t available or don’t work. In such cases, a call to customer service can solve the problem. Here’s what to do:

  • Have Your Details Ready
    Before calling, have your reservation number, KTN, and personal details handy.
  • Explain Your Request
    Ask the representative to add your KTN to your reservation. They might ask security questions to verify your identity.
  • Confirm the Update
    Once they’ve added your KTN, ask for confirmation. You might receive an email or text message with the updated details.

Using the Airline’s App

Using the airline’s app can be a convenient option. Here’s how to add your KTN using your smartphone:

  • Open the App
    Download and open the airline’s app. Log in with your credentials.
  • Access Your Booking
    Navigate to your upcoming trips and select the reservation you want to update.
  • Add Your KTN
    Look for the option to add or edit your KTN. Enter the number and save the changes.

Double-Check Before You Fly

After adding your KTN, ensure everything is set before you head to the airport. Here’s how to double-check:

  • Review Your Boarding Pass
    When you check in, make sure your boarding pass shows the TSA PreCheck logo. This indicates your KTN is linked to your reservation.
  • Check Your Email
    Some airlines send a confirmation email after updating your reservation. Look for this email to verify the changes.
  • Call Customer Service Again
    If you’re unsure, a call to customer service can confirm that your KTN is correctly added.

Adding your Known Traveler Number to an existing reservation doesn’t have to be a headache. With these steps, you can ensure a smoother and faster airport experience. Safe travels!

Making Travel Easier

Adding your Known Traveler Number to an existing reservation can make your travel experience smoother. This number helps you enjoy benefits like TSA PreCheck, which speeds up security checks. If you forgot to add it when booking, you can usually update your reservation online through the airline’s website or app. If that doesn’t work, call the airline’s customer service. They can help add your number to your booking. Always double-check your boarding pass to ensure your KTN is there. This small step can save you time and hassle at the airport. Remember, having your Known Traveler Number ready before you travel is key. It’s a simple way to make your journey more enjoyable. Safe travels!