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Energy Intensity of Certificated Air Carriers, All Services
Aircraft-kilometers 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-kilometers 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-kilometers to Available seat-kilometers.
Heat equivalent factor used for conversion is 37,626.7 kilojoules/liter.
1.609344 kilometers = 1 mile.
3.785412 liters = 1 gallon.
KEY: 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 http://www.air-transport.org/ as of July 31, 2002.1975-2018: U.S. Department of Transportation, EmEdjimurjE, T1: U.S. Air Carrier Traffic and Capacity Summary by Service Class, available at http://www.transtats.bts.gov/Fields.asp?Table_ID=264 as of Mar. 25, 2019.
1960-1984: Civil Aeronautics Board as of Sept 13, 2018.
1985-2018: U.S. Department of Transportation, EmEdjimurjE, Office of Airline Information, Airline Fuel Cost and Consumption, available at http://www.transtats.bts.gov/fuel.asp as of Mar. 25, 2019.
Seats per aircraft, seat-miles per gallon, energy intensiveness and load factor:
Derived by calculation.