How to Add a TSA PreCheck Number (KTN) to Delta Online

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Need to add your TSA PreCheck number to your Delta Airlines account? If you've applied for TSA PreCheck to save time walking through airport security, you can easily add your PreCheck number (Known Traveler Number) to your Delta Airlines profile online. While it's not possible to add your PreCheck number to your account using the Fly Delta mobile app, you can easily add it to your profile on Delta.com. This wikiHow article teaches you how to add your TSA PreCheck number to your Delta account online.