Acceptable Identification includes: a U.S. passport, U.S. passport card, DHS "Trusted Traveler" card, U.S. Military ID, Permanent Resident Card, Border Crossing Card, DHS-designated enhanced driver's license, Drivers Licenses or other state photo identity cards issued by Department of Motor Vehicles, Native American Tribal Photo, an airline or airport-issued ID, a foreign government-issued passport, Canadian provincial driver's license or Indian and Northern Affairs Canada (INAC) card, or a Transportation Worker Identification Credential (TWIC).
Those traveling from their citizenship country (a U.S. citizen) to another country (including Canada and Mexico if a U.S. citizen) must have a valid U.S. passport to present at the checkpoint and again at the flight gate. The name on the passport must match the name on the ticket.
For domestic travel, infants do not require identification for flight. For foreign travel, infants are required to have a valid passport from their citizenship country.
For domestic travel, a passport may be used, but a valid identification from the list above can be substituted, as passports are only required for travel outside of the citizenship country, or back into.
Because the name on the ticket and the name on the used identification must match, booking honeymoons and other trips that are immediately post-wedding should be done under the wife's maiden name if she is taking a married name. This will avoid confusion and delays, as most identification will have the maiden name immediately following the wedding until marriage licenses can be fulfilled.
If you are in possession of an out-dated passport, the identification can be used for domestic travel.
If needed, a second form of ID may be required when checking in. A second form of ID can be a non-photo ID, such as a credit card or something issued with your full name.