To make traveling to the airport quicker and easier, Southwest Airlines offers Southwest TSA PreCheck Travelers who meet the requirements can take advantage of TSA PreCheck, which offers quicker security screening and permits them to leave liquids and laptops in their baggage and wear shoes, belts, and light coats. By giving participants access to TSA PreCheck lanes, the program drastically cuts down on wait times. Simply add your Known Traveler Number (KTN) to your Southwest reservation in order to utilize this service. TSA PreCheck, which is available for both domestic and international flights, improves your travel experience by reducing trouble and increasing efficiency.