What you need to know
Deadline: Starting Jan. 2016, U.S. law requires travelers boarding domestic flights to have ID that conforms with federal security standards, known as Real ID.
Required proofs: Such ID requires verification of birth, Social Security number, residence and lawful status in the country.
Last holdouts: Minnesota and American Samoa are the last of the states and territories that have refused to adopt the standards or gotten an extension from the U.S. Department of Homeland Security.
Other accepted ID forms: Travelers here can opt for an enhanced license or ID card, but must pay $15 extra. Passports and passport cards are accepted. The cost for a passport is $110; for a passport card, $30. Processing time is about five weeks. A trusted traveler card (Global Entry, NEXUS, SENTRI or FAST) at airport checkpoints is also allowed.