Most major carriers, domestic and foreign, participate and some smaller airlines you may have never heard of. Although some low-cost airlines, such as Breeze and Spirit offer TSA PreCheck, others, like French Bee and Play do not.

No, not all airlines participate in TSA PreCheck, although the list has grown to over 90 domestic and international carriers by 2026. While all major U.S. airlines (Delta, United, American, Southwest, JetBlue) are members, many smaller foreign regional carriers or boutique airlines do not yet participate. To use PreCheck, both the airport and the airline must be part of the program. If you are flying on a non-participating airline, even if you have a Known Traveler Number (KTN) and are departing from a PreCheck-equipped airport, the TSA PreCheck indicator will not appear on your boarding pass, and you will have to go through the standard security line. This often happens with smaller international carriers or new low-cost startups that haven't yet integrated their booking systems with the TSA's Secure Flight database. In 2026, travelers are advised to check the official TSA website's "Participating Airlines" list before booking if expedited screening is a deal-breaker. Major additions in recent years include more South American and Asian carriers, making the service more ubiquitous for international travel.