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A Delta airplane is flying above a thick layer of clouds with a clear blue sky in the background.
A Delta airplane is flying above a thick layer of clouds with a clear blue sky in the background.

Historical GHG 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 GHG emissions.

For more information, see Fuel Efficiency

Fuel Efficiency

GHG Emissions Inventory (metric tons CO2e) 1, 2

Scope 1

2019 (baseline) 2022 2023 2024
Jet Fuel — Mainline Delta 34,967,854 28,905,698 34,078,477 35,448,915
Sustainable Aviation Fuel (SAF) 93 203 757
Jet Fuel — Wholly Owned Subsidiaries 2,181,283 1,668,437 1,616,701 1,680,266
Ground Operations (ground support equipment fuel use) 97,316 79,417 86,106 82,807
Ground Operations (other sources) 81,968 87,355 110,359 72,021
TOTAL SCOPE 1 37,328,421 30,741,000 35,891,846 37,284,766

Scope 23

2019 (baseline) 2022 2023 2024
Electricity — Direct Billed Facilities 152,849 126,653 107,920 106,477
Electricity — Leased Facilities 105,701 41,776 46,550 44,550
Natural Gas — Leased Facilities 37,339 35,057 33,917 14,357
TOTAL SCOPE 2 295,889 203,486 188,387 165,384

Scope 34

2019 (baseline) 2022 2023 2024
Cat 1 (Purchased Goods & Services) 1,514,455 1,664,146 1,627,496
Cat 2 (Capital Goods) 1,395,376 1,565,215 1,828,810
Cat 3 (Fuel)5 10,946,766 8,450,703 9,307,4226 10,377,646
Cat 4 (Upstream Transport) 938,765 690,054 1,041,200
Cat 5 (Waste) 68,454
Cat 6 (Business Travel) 91,472 120,677
Cat 7 (Employee Commute) 1,617,8216 1,436,828
Cat 15 (Investments) 5,162,982 6,618,771
TOTAL SCOPE 3 10,946,766 12,299,299 20,099,112 23,119,882
SUM OF EMISSIONS 48,571,076 43,243,785 56,179,344 60,570,033
Biogenic TTW Emissions (SAF) (CO2)7 — 15,324 33,398 124,582
  1. All emissions were calculated and verified using the GHG Protocol, which is in alignment with the guidance of SBTi.
  2. All emissions calculations use the most current emission factors except for Scope 1 (Jet Fuel), to stay aligned with other International Civil Aviation Organization member airlines, and Scope 3 (Categories 1, 2 and 4).
  3. Scope 2 emissions are calculated using only location-based methodology; emission factors from contractual instruments between Delta and energy providers are not available.
  4. Scope 3 data for 2019 includes Category 3; Scope 3 data for 2022 includes Categories 1, 2, 3 and 4; Scope 3 for 2023 includes Categories 1, 2, 3, 4, 6, 7 and 15; Scope 3 for 2024 includes Categories 1, 2, 3, 4, 5, 6, 7 and 15. Scope 3 Categories 3, 5, 7 and 15 calculations use primary data. Scope 3 Categories 1, 2, 4 and 6 use secondary (spend) data.
  5. Mainline + Wholly Owned Subsidiaries well-to-tank (WTT), Regional Partners well-to-wake (WTW), SAF WTT.
  6. This reflects a correction to data in the 2023 Report.
  7. Biogenic tank-to-wake (TTW) carbon dioxide emissions are reported separately from the scopes, consistent with current guidance from the GHG Protocol. The 2024 biogenic TTW emissions from SAF were 124,582 mT CO2e.