Yes, you can use TSA PreCheck on Lufthansa, as it was the first European airline to join the program. In 2026, the process remains seamless for eligible travelers departing from U.S. airports where Lufthansa operates. To use it, you must enter your Known Traveler Number (KTN) into your reservation profile before checking in. Once the "TSA PRE" indicator appears on your digital or paper boarding pass, you can utilize the dedicated security lanes. This allows you to keep your shoes, belts, and light jackets on, and you do not need to remove your laptop or liquids from your carry-on bag. While Lufthansa supports the program, the physical PreCheck lanes are managed by the TSA, so you must ensure the specific terminal you are departing from (such as Terminal 1 at JFK or the Tom Bradley International Terminal at LAX) has the PreCheck infrastructure available during your flight's operating hours.