Can I add known traveler number to already booked flight?

How do I add my Known Traveler Number (KTN) to previous reservations? Contact your airline by phone or online to add your Known Traveler Number (KTN).



Yes, you can absolutely add your Known Traveler Number (KTN) to a flight that has already been booked. In 2026, most major airlines—including Delta, United, and American—allow you to do this via their mobile app or website under the "Manage Trip" or "View Reservation" section. You simply find the "Passenger Information" or "Edit Traveler Details" field and enter your 9-digit KTN. It is important to do this as soon as possible, as the TSA requires this data to be transmitted well before departure to generate the "TSA PreCheck" indicator on your boarding pass. If you forget to do it before check-in, you can often still add it at the airport kiosk or by speaking to a gate agent. However, the name on your reservation must exactly match the name associated with your KTN; if there is a spelling error or a missing middle name, the system will reject the number, and you will be stuck in the standard security line regardless of your membership status.

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If you still do not have a TSA PreCheck indicator on your boarding pass, please call the TSA Contact Center at (866) 289-9673, submit an online form, or contact us at @AskTSA on Twitter and Facebook Messenger.

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If you wish to include an additional traveler, you will need to make a separate booking.

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To do so, click on Manage Trip for each reservation. Then, click on Add/Edit Passenger Information to add your PreCheck number.

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Boarding passes If you're eligible for TSA PreCheck, your boarding pass will show TSA PreCheck. If you add your KTN after checking in, you'll need to get a new boarding pass.

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TSA PreCheck® provides expedited security screening benefits for flights departing from U.S. Airports. Global Entry provides expedited U.S. customs screening for international air travelers when entering the United States. Global Entry members also receive TSA PreCheck® benefits as part of their membership.

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If you apply for TSA PreCheck first, you will have to pay another fee for Global Entry if you decide to apply later. But if you apply for Global Entry first, you will only need to pay one application fee, saving you time and money.

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You can't add someone to your ticket - you'll have to just purchase a new ticket for that person at the going rate of the day. You won't be on the same itinerary, but you should be able to link them as traveling with you - or your travel agent can or airline rep. Is it difficult to find a luxury travel agent?

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There's no TSA PreCheck in Europe (womp womp), but at select Europe airports, travelers can head to the front of the security line, free of charge.

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U.S. citizens and U.S. lawful permanent residents enrolled in Global Entry, NEXUS or SENTRI are eligible to participate in TSA PreCheck®, as well as Canadian citizens who are members of NEXUS.

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