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The side view of a Delta airplane's fuselage and tail against a blue sky with some clouds.
The side view of a Delta airplane's fuselage and tail against a blue sky with some clouds.

Fuel Efficiency

Fuel Efficiency1

MAINLINE + DELTA
CONNECTION		 Metric Defined 20192 2022 2023 2024
JET FUEL GALLONS (millions) Jet fuel from mainline + Connection Carrier operations 4,207 3,412 3,926 4,114
REVENUE PASSENGER MILES (millions) Number of paying passengers multiplied by the distance they traveled in miles 237,680 195,480 232,241 246,145
TOTAL RTK (millions) Sum of passenger and cargo revenue ton miles, converted to kilometers 41,163 33,705 39,562 42,328
FUEL EFFICIENCY (gallons/100 RTK) Fuel efficiency on a payload-mile basis 10.22 10.12 9.92 9.72
AVAILABLE SEAT MILES (ASMs; millions) Number of seats available to sell multiplied by the distance traveled 275,379 233,226 272,026 288,394
FUEL EFFICIENCY (gallons/1,000 ASM) Fuel efficiency on a capacity basis 15.28 14.63 14.43 14.27
  1. Totals may not sum due to rounding.
  2. 2019 data is included as a reference for our target baseline.