In 2025, Delta Air Lines completed a corporate carbon footprint assessment and publicly disclosed its greenhouse gas (GHG) emissions according to the GHG Protocol, covering Scope 1 (direct emissions from owned or controlled sources), Scope 2 (indirect emissions from purchased energy) and Scope 3 (indirect emissions across the value chain).
However, Delta Air Lines has not published a category-level breakdown of its Scope 3 emissions, limiting visibility into specific value chain sources.
| Metric (tCO2e) | 2025 | 2024 | 2023 | 2022-2019 |
|---|---|---|---|---|
Total Scope 1 | 39,301,990a | 38,062,069a | 36,647,348a | |
Total Scope 2 | ||||
Market-Based | N/A | N/A | N/A | |
Location-Based | 116,107a | 116,079a | 107,945a | |
Unspecified Calculation Method | N/A | N/A | N/A | |
Total Scope 3 | 22,857,305a | 21,329,368a | 18,211,309a | |
Total Scope 1 Revenue Intensity (tCO2e/$M) | 620.2574a | 617.4597a | 631.3283a |
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In 2025, the total operational greenhouse gas (GHG) emissions of Delta Air Lines amounted to 39,418,097 metric tons of CO2 equivalent. This figure includes both direct emissions from owned or controlled sources (Scope 1) and indirect emissions from purchased energy (Scope 2).a
Compared to 2024, the total operational greenhouse gas (GHG) emissions of Delta Air Lines increased by 3.25%, suggesting that the company faced challenges in reducing its emissions from its core operations.a
In 2025, the total Scope 1 emissions of Delta Air Lines were 39,301,990 metric tons of CO₂ equivalent (tCO₂e).a
Since 2019, Delta Air Lines's Scope 1 emissions have increased by 5.29%, reflecting a rising long-term trend in Scope 1 emissions over time.a
Compared to the previous year (2024), Delta Air Lines's Scope 1 emissions increased by 3.26%, suggesting that the company faced challenges in reducing emissions from its directly owned or controlled operations.a
In 2025, Delta Air Lines reported Scope 2 greenhouse gas (GHG) emissions of 116,107 tCO₂e using the location-based method.a
Since 2019, Delta Air Lines's Scope 2 greenhouse gas (GHG) emissions (Location-Based) have decreased by 24.04%, reflecting a declining long-term trend in Scope 2 emissions over time.a
Compared to the previous year (2024), Delta Air Lines's Scope 2 emissions (Location-Based) have remained relatively stable, indicating that Delta Air Lines's emissions have plateaued with no significant change in its energy consumption footprint.a
In 2025, Delta Air Lines reported its Scope 2 emissions using the location-based method.a
In 2025, Delta Air Lines reported 22,857,305 metric tons of CO₂ equivalent (tCO₂e) of Scope 3 greenhouse gas (GHG) emissions, representing indirect emissions across its upstream and downstream value chain.a
The 2025 disclosure of Delta Air Lines includes a breakdown across 0 of the 15 Scope 3 categories defined by the GHG Protocol, matching the level of disclosure in 2024, demonstrating consistent Scope 3 emissions reporting coverage year over year.a
In 2025, Delta Air Lines reported total Scope 3 emissions of 22,857,305 metric tons of CO₂ equivalent (tCO₂e).a
Since 2019, Delta Air Lines's Scope 3 emissions have increased by 106.11%, reflecting a rising long-term trend in Scope 3 emissions over time.a
Compared to the previous year (2024), Delta Air Lines's Scope 3 emissions remained relatively stable, indicating that Delta Air Lines's emissions have plateaued with no significant change in its value chain footprint.a
In 2025, Delta Air Lines reported Scope 1 greenhouse gas (GHG) emissions of 39,301,990 tCO₂e and total revenues of USD 63,364 millions. This translates into an emissions intensity of 620.26 tCO₂e per millions USD.a
In 2025, Delta Air Lines reported a Scope 1 emissions intensity of 620.26 tCO₂e per millions USD. Compared to the peer group median of 830.79, this places the company below its industry benchmark, indicating it is more carbon-efficient than most competitors.a
In 2025, Delta Air Lines ranked 6 out of 25 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
Delta Air Lines is therefore positioned in the mid-range of its industry, neither a clear leader nor a laggard in carbon efficiency.a
In 2025, Delta Air Lines reported a total carbon footprint of 62,275,402 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 4.65% increase compared to 2024, suggesting a rise in emissions across its operations or value chain.a
The largest contributor to Delta Air Lines's total carbon footprint was Scope 1 emissions, accounting for 63.11% of the company's total carbon footprint, followed by Scope 3 emissions at 36.7%.a