How do I get on a airplane if my ID was stolen?

In the event you arrive at the airport without valid identification, because it is lost or at home, you may still be allowed to fly. The TSA officer may ask you to complete a form to include your name and current address, and may ask additional questions to confirm your identity.

If you do not have a valid method of identification that can be used to go through TSA, you do have one option available to you. The TSA can verify your identity by asking you some questions and confirming the information based on publicly available databases. If they cannot confirm your identity with the information that you provided or do not want to provide the information needed to confirm your identity, you may not be able to fly.

It's easier to just to get a new one first if you can but if not you need to bring other documentation to tsa to prove who you are.