Essential Air Service

Essential Air Service (EAS) is a U.S. government program enacted to guarantee that small communities in the United States, which, prior to deregulation, were served by certificated airlines, maintained commercial service. Its aim is to maintain a minimal level of scheduled air service to these communities that otherwise would not be profitable. This came in response to the Airline Deregulation Act, passed in 1978, which gave U.S. airlines almost total freedom to determine which markets to serve domestically and what fares to charge for that service. The program is codified at 49 U.S.C. §§ 41731–41748.

The United States Department of Transportation (DOT) subsidizes airlines to serve rural communities across the country that otherwise would not receive any scheduled air service. As of June 1, 2009, 152 communities were being served with a subsidy, of which 45 were in Alaska, whose guidelines for service are separate and distinct from the rest of the country. The decision as to what degree of subsidized service a community requires is made based on identifying a specific hub for the community and from there determining the number of trips, seats, and type of aircraft that are necessary to reach that hub.