Data

Every figure on this site is in one CSV file: 398 rows, one per airline per year, 2000 to 2025.

Columns

Column	Meaning
passenger_miles_per_gallon	Revenue passenger-miles divided by gallons of jet fuel in scheduled passenger service
passenger_miles_per_gallon_low, _high	Range across the two ways of splitting regional flying; equal for airlines without regional partners
seat_miles_per_gallon	Available seat-miles divided by gallons
kg_co2_per_passenger_mile	Gallons times 9.75 kg CO2 per gallon, divided by passenger-miles
load_factor	Passenger-miles divided by seat-miles
seats_per_departure, average_trip_miles	Seats on the average flight; miles flown per passenger on the average flight segment
type	with_regional_partners: includes regional flying allocated to the airline. own_flying_only: no regional partners
regional_share_percent	Share of the airline's seat-miles flown by regional partners

Sources and terms

Fuel gallons: US Bureau of Transportation Statistics (BTS), Form 41 Schedule P-12(a), scheduled service totals. Traffic: BTS Form 41 Schedule T-100 segment data for US carriers, scheduled passenger service. Emission factor: US EPA GHG Emission Factors Hub, kerosene-type jet fuel, 9.75 kg CO2 per gallon.

The source figures are works of the US federal government. The calculations and the regional allocation are ours. Data last built 2026-10-14.