Yes, it is possible to get through TSA security at U.S. airports without a physical ID, but it is a much more intensive process. If you lose your ID or leave it at home, you should arrive at the airport at least two to three hours earlier than usual. A TSA officer will put you through an identity verification process which involves collecting personal information such as your name, current address, and other details to confirm your identity against public databases. You may also be asked to show other items that have your name on them, such as a prescription bottle, a library card, or a student ID. Once your identity is confirmed, you will undergo an enhanced screening process, which typically includes a thorough pat-down and an inspection of all carry-on property. In 2026, while the REAL ID requirement is in full effect for standard travel, the "lost ID" protocol remains a safety net. However, keep in mind that this is entirely at the TSA's discretion; if they cannot verify your identity to their satisfaction, you will not be allowed to enter the sterile area of the terminal.