How Do You Add TSA PreCheck® to Alaska AirlinesAdding TSA PreCheck® to your Alaska Airlines flights is straightforward. Begin by logging into your Alaska Airlines Mileage Plan account and accessing your profile. Under "Traveler Information," enter your Known Traveler Number (KTN) in the designated TSA PreCheck® field. Save your changes, and you're all set! TSA PreCheck® provides expedited security screening at airports across the United States, making your travel experience smoother and more efficient. Enjoy shorter lines and keep your shoes on during screening, ensuring a hassle-free journey with Alaska Airlines.