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Appendix

Historical Emissions Data

Climate Metrics & Targets

Our climate strategy is guided by metrics and targets that help to drive and serve as key indicators of our progress.

GHG EMISSIONS INVENTORY

We assess our impact and progress primarily through ongoing evaluation of our direct and indirect greenhouse gas (GHG) emissions.

For more information, see Fuel Efficiency

Fuel Efficiency

GHG Emissions Inventory (metric tons CO2e)1, 2

Scope 1
2019 (baseline) 2021 2022 2023
Jet Fuel – Mainline Delta 34.967.854 22.647.716 28.905.698 34.078.477
Sustainable Aviation Fuel3 93 203
Jet Fuel – Wholly-Owned Subsidiaries 2.181.283 1.745.400 1.668.437 1.616.701
Ground operations (ground service equipment (GSE) fuel use) 97.316 76.586 79.417 86.106
Ground operations (non-GSE fuel use) 81.968 91.554 87.355 110.355
TOTAL SCOPE 1 37.328.421 24.561.256 30.741.000 35.891.842
Scope 2
2019 (baseline) 2021 2022 2023
Electricity – Direct Billed facilities 152.849 113.738 126.653 107.920
Electricity – Leased facilities 105.701 94.574 41.776 46.550
Natural Gas – Leased facilities 37.339 37.907 35.057 33.917
TOTAL SCOPE 2 295.889 246.219 203.486 188.387
Scope 34
2019 (baseline) 2021 2022 2023
Category 1 (Purchased Goods and Services) 1.514.455 1.664.146
Category 2 (Capital Goods) 1.395.376 1.565.215
Category 3 (Fuel5) 10.946.766 7.289.033 8.450.703 7.882.984
Category 4 (Upstream Transport) 938.765 690.054
Category 6 (Business Travel) 91.472
Category 7 (Employee Commute) 135.373
Category 15 (Investments) 5.162.982
TOTAL SCOPE 3 10.946.766 7.289.033 12.299.299 17.192.226
SUM OF EMISSIONS 48.571.076 32.096.508 43.243.785 53.272.455
  1. All emissions were calculated and verified using the GHG Protocol, which is in alignment with the guidance of the Science Based Targets initiative (SBTi).
  2. Previous ESG reports included Delta’s “CO2 only” emissions to provide an equivalent comparison against Delta’s offset purchases. As of 31. März 2022, we concluded our offsetting program, therefore eliminating the need to report both CO2 only and CO2e emissions. CO2e emissions include carbon dioxide, methane, and nitrous oxide emissions aggregated in accordance with GHG Protocol using AR5 Global Warming Potentials (GWPs).
  3. Biogenic Tank to Wake (TTW) carbon dioxide emissions are reported separately from the scopes, consistent with current guidance from the Greenhouse Gas Protocol. The 2023 biogenic TTW emissions from SAF were 33.405 mT CO2. This calculation has not been independently verified for 2023. The 2022 biogenic TTW emissions from SAF can be found in the 2022 Delta ESG report.
  4. We have restated prior years’ reporting of Scope 3 Category 3 emissions and updated our 2019 baseline accordingly. Scope 3 Categories 3, 7 and 15 calculations use primary data. Scope 3 Categories 1, 2, 4 and 6 use secondary (spend) data. We continue to evaluate the feasibility of disclosing additional Scope 3 categories in the future.
  5. Mainline + Wholly-Owned Subsidiaries well-to-tank (WTT), Regional Partners well-to-wake (WTW), SAF WTT.