The TSA officer you speak with at the airport about your lost ID will likely ask you to fill out a form which includes your name and current address. They will likely follow this up by asking you additional questions to hopefully confirm your identity. If your identity is confirmed you will be allowed to fly.
Also to know is, is an ID valid if it is expired?
If you're not allowed to accept an expired ID, there may be alternatives to identify your signer, but these methods also vary by state. In most cases, a valid, unexpired U.S. passport would be acceptable. U.S. passports are valid for 10 years, typically double that of most driver's licenses and state IDs.
How long can you use your ID after it expires?
Grace period of 60 days granted after the expiration of license for purpose of renewal, and license is valid during this period. Renewal of license may occur from 60 days (effective August 1, 2016, 180 days) prior to expiration to 3 years after date; afterwards, applicant required to take and pass examination.
Can you board a plane with an expired passport?
Traveling Internationally. However, if your passport is expired, you cannot travel internationally. While a person used to be able to enter Mexico and Canada with just a driver's license, now you are required to have a valid passport to make the trip.