To amend title 49, United States Code, relating to civil penalties for unruly passengers of air carriers.

Amends Federal aviation law to subject to a civil penalty of up to $25,000 any individual who interferes with the duties or responsibilities of the flight crew or cabin crew of a civil aircraft, or who poses an imminent threat to the safety of the aircraft or other individuals on the aircraft. Authorizes the Secretary of Transportation, in addition or as an alternative, to prohibit for not more than one year the individual from flying as a passenger on a civil aircraft. Requires the Secretary to notify all air carriers of the prohibition, including its term. Subjects to a civil penalty of up to $25,000 any air carrier which provides air transportation to an individual who has been prohibited from flying on a civil aircraft.