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Energy Intensity of Certificated Air Carriers, All Services
Aircraft-miles include all four large certificated air-carrier groups (majors, nationals, large regionals, and medium regionals), scheduled and charter, passenger, and all-cargo. Fuel consumed includes majors, nationals, and large regionals, scheduled and charter, passenger, and all-cargo.
Passenger-miles include all four large certificated air-carrier groups, scheduled and charter, passenger service only.
International operations include operations outside the United States, including those between the United States and foreign countries and the United States and its territories or possessions.
Load factor: Ratio of Passenger-miles to Available seat-miles.
Heat equivalent factor used for Btu conversion is 135,000 Btu/gallon.
KEY: Btu = British thermal unit; R = revised.
a U.S. owned carriers only. Operations of foreign-owned carriers in or out of the United States not included.
Aircraft-miles, available seat-miles, and passenger-miles:
1960-70: Air Transport Association, available at as of July 31, 2002.
"1975-2017: U.S. Department of Transportation, EmEdjimurjE, T1: U.S. Air Carrier Traffic and Capacity Summary by Service Class, available at as of Jun. 13, 2018."
U.S. Department of Transportation, EmEdjimurjE, Office of Airline Information, Airline Fuel Cost and Consumption, available at as of Jun. 13, 2018.
Seats per aircraft, seat-miles per gallon, energy intensiveness and load factor:
Derived by calculation.