Hi everyone! I’m Diana Barnes, your travel expert. A common question many people have that How Do You Add TSA PreCheck® to United Airlines? Here’s how to do it: First, enroll in the TSA PreCheck® program and get your Known Traveler Number (KTN). Next, log into your MileagePlus account and add your KTN to your profile. When booking your flight, make sure to include your KTN in the specified field. Finally, check your boarding pass for the TSA PreCheck® logo. This will help you enjoy faster security screening and a more enjoyable travel experience!