Carbon Footprint — Operations: How does Delta Air Lines score?

Delta reports verified Scope 1 (~37.3Mt CO2e) and Scope 2 (~165Kt CO2e) emissions for 2024, calculated per GHG Protocol with third-party assurance by Dillon Consulting (reasonable assurance for Scope 1&2). Multi-year historical data back to 2019 is provided with granular breakdowns by source. Verified and publicly disclosed with methodology, but absolute emissions are not declining, preventing a higher score.

Carbon Footprint — Supply Chain: How does Delta Air Lines score?

Delta expanded its Scope 3 inventory in 2024 to include 8 categories (1, 2, 3, 4, 5, 6, 7, and 15), reporting approximately 23.1Mt CO2e. Categories include purchased goods, capital goods, upstream transportation, fuel well-to-wake, waste, business travel, employee commuting, and investments. Delta has supplier engagement targets including 100% of preferred vendors on carbon tracking by 2025 and net-zero plans by 2030. Full quantification methodology in place, but Scope 3 rose 15% year-over-year.

Emissions Trajectory: How does Delta Air Lines score?

Delta's total emissions are rising in absolute terms. 2023 total of 53.3Mt exceeded the 2019 baseline of 48.6Mt, and 2024 total is approximately 60.6Mt — a further increase. While Scope 1 emissions intensity per seat mile improved 6.6% vs 2019, absolute total emissions are well above pre-pandemic levels and climbing. The SBTi target is intensity-based (45% per RTK by 2035), not absolute — this is a critical distinction. Per SINK methodology, intensity improvements with rising absolute emissions

Energy Source: How does Delta Air Lines score?

Approximately 90% of Delta's carbon footprint comes from jet fuel combustion, over which renewable energy strategies have limited near-term impact. Delta installed 3.7MW rooftop solar at Atlanta HQ expected to cover ~60% of campus electricity, and has deployed 2,029 electric GSE units. However, there is no comprehensive renewable energy strategy for the airline's primary energy consumption. Delta is not a member of RE100 (that is Delta Electronics, a different company). SAF represented only ~13

Nature & Biodiversity Impact: How does Delta Air Lines score?

No evidence of TNFD disclosure, biodiversity policy, or nature risk assessment in Delta's reporting. Delta previously invested in REDD+ forest protection offsets (Cambodia, Guatemala, Kenya) but ended offset purchases in March 2022. Aviation operations create contrail impacts and noise pollution affecting ecosystems near airports. SAF feedstock supply chains carry deforestation and monoculture risks. Delta's research partnership with MIT on contrails is noted but is research, not mitigation. No

Resource Use & Waste: How does Delta Air Lines score?

Delta is actively reducing onboard waste: eliminating approximately 7 million pounds of single-use plastic annually via paper cup transition, kraft paper earbud packaging, and sustainable amenity kits. Some Sky Clubs achieve 90% landfill diversion. A centralized three-bin waste system has been rolled out at headquarters. The Salt Lake City terminal achieved LEED Gold. Long-term goal of 100% onboard waste diversion by 2050 is stated. However, no comprehensive circularity metrics or verified waste

Water Impact: How does Delta Air Lines score?

Historical data shows Delta reduced water usage at its Atlanta Technical Operations Center by 50% and implemented recycling systems to reduce consumption by up to 80%. The PreKote aircraft surface preparation process reduces water usage and hazardous waste. However, no recent comprehensive water footprint data, reduction targets, or systematic water reporting has been identified in the 2023 or 2024 reports. Water impact is secondary for airlines compared to fuel, but Delta operates major mainten

Targets & Commitments: How does Delta Air Lines score?

Delta has an SBTi-validated medium-term target: 45% reduction in well-to-wake Scope 1 & 3 jet fuel emissions per revenue ton kilometer by 2035 (base year 2019). This is intensity-based, not absolute, which warrants a lower score. Net-zero 2050 goal is stated but SBTi validation has been pending since 2022 due to delayed aviation sector guidance. Delta ended carbon offset purchases in March 2022, which is a positive shift to reduction-first. Specific operational targets include 10% SAF by 2030, 2

Transparency & Accountability: How does Delta Air Lines score?

Delta publishes an annual Delta Difference Report aligned with SASB and TCFD frameworks, covering 2024 data. It has a dedicated Chief Sustainability Officer (Amelia DeLuca), Board-level oversight via the Corporate Governance Committee (briefed twice in 2023), and an Audit Committee reviewing climate risks. A separate Climate Lobbying Report is published annually since 2022 detailing policy engagement activities. Emissions are third-party verified. Trade association memberships are disclosed with

Controversies & Red Flags: How does Delta Air Lines score?

Starting at 8: Deduct 2 for the ongoing Berrin v. Delta class-action greenwashing lawsuit (filed May 2023, federal court allowed key claims to proceed — alleging false carbon-neutral marketing from 2020-2022 based on unreliable offsets). Deduct 1 for InfluenceMap Organization Score of 46%, indicating misalignment with 1.5°C Paris goals, with evidence of opposing EU ETS scope expansion and advocating for the weakest CORSIA baseline. Deduct 1 for membership in trade associations with negative clim

Delta Air Lines Sustainability Score: 23/100

Recently scored: Dentsu, Omnicom, Publicis Groupe, WPP

507 companies scored·4 score updates this week

Delta Air Lines·Aerospace·Atlanta, United States·Founded 1924·Last verified 21 April 2026

out of 100

Significant gapsPending Review

Delta reports verified emissions across Scopes 1–3 but absolute totals are rising sharply: 60.6Mt CO2e in 2024 versus 48.6Mt in 2019. Intensity targets mask this deterioration. Critical weaknesses: zero biodiversity policy, greenwashing lawsuit pending, trade association misalignment with climate goals, and SAF at under 1% of fuel consumption.

No challenges currently filed

The calculation

Every score shows its working.

Same formula for every company. No curve. No private weighting.

SINK = (0.3 × Base + 0.7 × Performance) × Scale

Industry base impact

Aerospace sector ceiling.

38 / 100

Performance score

Sum of the 10 rubric questions, scored 0–10 each.

38 / 100

Raw score

Weighted average before scale penalty.

(0.3 × 38) + (0.7 × 38) = 38.0

Scale penalty

Multiplier based on absolute emissions volume — physics-first.

× 0.6

Final score

Rounded. Significant gaps.

23 / 100

The ten questions

Where Delta Air Lines is strong, and where it isn't.

Strongest on Carbon Footprint — Operations and Transparency & Accountability (7/10, 7/10). Weakest on Nature & Biodiversity Impact and Emissions Trajectory (1/10, 1/10).

Where the evidence comes from

Every document used, listed.

17 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.

[1]Self-reported

Delta ESG Hub – Emissions Verification 2024

2024

Every score shows its working.

Where Delta Air Lines is strong, and where it isn't.

Every document used, listed.

Where Delta Air Lines sits among aerospace peers.

Delta Air Lines's score over time.

This score is not currently being contested.

Related companies worth a look.

We'll let you know when the score moves.

Which companies moved this week, and why.