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Appendix

Fuel Efficiency

Fuel Efficiency 1

MAINLINE + DELTA
CORRESPONDANCE 		Metric Defined 2019 2 2021 3 2022 2023
JET FUEL GALLONS (millions) Jet fuel from mainline + Connection Carrier operations 4 207 2 778 3 412 3 926
REVENUE PASSENGER MILES (millions) Number of paying passengers multiplied by the distance they traveled in miles 237 680 134 692 195 480 232 241
TOTAL RTK (millions) Sum of passenger and cargo revenue ton miles, converted to kilometers 41 163 23 876 33 705 39 562
FUEL EFFICIENCY (gallons/100 RTK) Fuel efficiency on a payload-mile basis 10,22 11,63 10,12 9,92
AVAILABLE SEAT MILES (millions) Number of seats available to sell multiplied by the distance traveled 275 379 194 474 233 226 272 026
FUEL EFFICIENCY (gallons/1,000 ASM) Fuel efficiency on a capacity basis 15,28 14,28 14,63 14,43
  1. Totals may not sum due to rounding.
  2. 2019 data is included as a reference for our target baseline.
  3. Fuel efficiency / RTK was impacted in 2021 by lower passenger loads during the COVID-19 pandemic and Delta’s middle seat blocking measures through 30 avril 2021.