Unlike international air travel, which requires a valid national passport and permission to enter the country of destination in order to board a plane, when traveled domestically within the USA, passengers are allowed to rely on a variety of identification documents to pass the TSA security check points and be permitted to board a plane. These domestic flights ID requirements are not applicable to international flights.
Adult passengers (individuals of 18 years of age and older) are required to present valid, accepted identification documents at the airport checkpoint in order to be permitted to path through the security and board a plane.
TSA screens travelers for appropriate ID requirements needed for traveling domestically. The following is a list of acceptable ID for domestic flights:
- U.S. passport
- U.S. passport card
- DHS trusted traveler cards (Global Entry, NEXUS, SENTRI, FAST)
- U.S. military ID (active duty or retired military and their dependents, and DOD civilians)
- Permanent resident card
- Border crossing card
- DHS-designated enhanced driver's license
- Driver's licenses or other state photo identity cards issued by Department of Motor Vehicles (or equivalent) for the sole purpose of identification
- Native American tribal photo ID
- HSPD-12 PIV card
- Airline or airport-issued ID (if issued under a TSA-approved security plan)
- Foreign government-issued passport
- Canadian provincial driver's license or Indian and Northern Affairs Canada card
Transportation Worker Identification Credential
TSA makes it clear that any form of a weapon permit is not considered an acceptable form of identification.
In a situation when, at times, a passenger for a variety of reasons arrived at the airport without acceptable ID, TSA may agree to accommodate such passenger by trying to confirm this individual's identity by other means. If that happened, the passenger will be asked to provide additional information needed to allow the TSA agents to utilize publicly available databases to verify the identity of the passenger, who may also be subjected to additional screening in the process. If the passenger's identity cannot be verified this way, the passenger will not be allowed to enter the screening checkpoint or to board a plane.
References: http://www.tsa.gov/travel/security-screening/identification [link]