FAA airport categories

The United States Federal Aviation Administration (FAA) has a system for categorizing public-use airports (along with heliports and other aviation bases) that is primarily based on the level of commercial passenger traffic through each facility. It is used to determine if an airport is eligible for funding through the federal government's Airport Improvement Program (AIP). Less than 20% of airports in the U.S. qualify for the program, though most that don't qualify are private-use-only airports.[1]

At the bottom end are general aviation airports. To qualify for the AIP, they must have at least 10 aircraft based there, but handle fewer than 2,500 scheduled passengers each year. This means that most aircraft are small and are operated by individuals or other private entities, and little or no commercial airline traffic occurs. Nearly three-quarters of AIP-funded airports are of this type.

Most of the remaining airfields that qualify for funding are commercial service airports, and are more dependent on regularly scheduled commercial airline traffic. This is subcategorized into primary airports, which handle more than 10,000 passengers each year, and nonprimary airports, which handle between 2,500 and 10,000 passengers annually.[2] These categories account for over 15% of AIP-funded airports in the U.S.

Primary airports are further subcategorized into:[2]

A third major category contains reliever airports, which are essentially large general-aviation airports located in metropolitan areas that serve to offload small aircraft traffic from hub airports in the region. These account for the remaining 10% of AIP-funded airports.


  1. "The Federal Aviation Administration's Take on Airports". General Aviation Flying. Aircraft Owners and Pilots Association. Archived from the original on September 27, 2007.
  2. 1 2 Federal Aviation Administration: Airport Categories
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