You do not need id to check in at Southwest. You need a confirmation number and your name. You can get that by logging in to your account or by referring to the e-mail that Southwest sent you when you completed the booking. If you don't know how to do that you can check in by using a credit card at the airport.

Flying without a physical ID on Southwest Airlines is possible but involves a rigorous secondary verification process. Under TSA regulations, if you lose your ID or leave it at home, you may still be allowed to fly if you can provide alternative forms of identification, such as a social security card, birth certificate, or even a Costco card, and answer a series of security questions to verify your identity. However, starting May 7, 2025, the REAL ID Act requires all passengers 18+ to have a REAL ID-compliant license or another acceptable form of ID (like a passport) for domestic travel. In 2026, those without a compliant ID may be required to use the TSA ConfirmID service, which often involves a $45 fee and additional screening time. If you cannot successfully verify your identity through these channels, you will be denied entry to the security checkpoint and will not be allowed to board your flight.