America's largest airline by passengers carried, operating over 5,000 daily flights and investing modestly in sustainable aviation fuel while remaining almost entirely dependent on jet fuel.
Green Score
- Greenwashing risk
- high
- Data confidence
- medium
- Method
- how it is calculated
Climate Impact & Solution35%8
Does the core business genuinely avoid or reduce emissions, or build climate resilience? Share of revenue that is actually 'green'. Fossil-dependent models score low.
Delta's core business is burning vast quantities of jet fuel; SAF adoption remains minimal and no credible near-term pathway exists to materially reduce absolute aviation emissions, making its climate impact net-negative regardless of efficiency improvements.
Decarbonization & Targets20%22
Credible, science-based targets (SBTi), a real net-zero plan with progress to date, and CDP disclosure — not just a dated press release.
Delta states a net-zero-by-2050 ambition and participates in TCFD disclosure, but its own 2024 climate disclosures confirm it is re-evaluating whether to withdraw from SBTi and reapply for 2050 net-zero validation in the future — meaning targets are currently unvalidated by any science-based framework.
ESG & Operations15%38
Operational footprint, labour and social practices, and governance quality across the company's own operations and supply chain.
Delta publishes annual sustainability ('Difference') reports with board-level climate oversight, links some executive pay to GHG reduction KPIs, and engages in climate policy advocacy; however, its lobbying disclosure has been flagged as not meeting criteria under the Global Standard on Responsible Climate Lobbying.
Transparency & Verification15%40
Quality of disclosure, independent third-party verification, and how much hard data backs the company's claims.
Delta provides TCFD-aligned disclosures, participates in CDP, and publishes detailed climate lobbying summaries, but third-party verification of emissions data is limited and the SBTi validation gap undermines the credibility of headline commitments.
Integrity15%30
Controversies, litigation, pollution, fossil-fuel lobbying, conflict-zone involvement and governance scandals. Higher means cleaner.
An ongoing federal greenwashing class-action lawsuit (Berrin v. Delta) alleges Delta falsely marketed itself as 'the world's first carbon-neutral airline' by relying on low-quality, largely unverifiable carbon offsets rather than actual emissions reductions — a case that survived a partial motion to dismiss in December 2024.
Why it's on ClimateTicker
Delta Air Lines is one of the world's largest emitters in commercial aviation, burning hundreds of millions of gallons of jet fuel annually and generating tens of millions of tonnes of CO2. It publishes TCFD-aligned reports and claims a net-zero-by-2050 ambition, but its SBTi targets remain unvalidated (Delta disclosed it is re-evaluating whether to withdraw and reapply), its historic 'carbon-neutral airline' marketing claim is the subject of an ongoing federal greenwashing class-action lawsuit, and SAF represents a negligible fraction of actual fuel consumed. The gap between marketing and verified impact is wide.
Commitments & Certifications
Controversy & Greenwashing Watch
LobbyMap (InfluenceMap) assessed Delta's climate lobbying disclosure as failing to meet the criteria of the Global Standard on Responsible Climate Lobbying as of Q3 2025.lobbymap.org
Delta disclosed in its 2024 climate report that it is actively re-evaluating whether it must withdraw from SBTi, meaning its headline science-based targets could lapse without validated replacement.esghub.delta.com
A class-action lawsuit filed in 2023 alleges Delta fraudulently marketed itself as 'the world's first carbon-neutral airline' by relying on low-quality carbon offsets, with the case surviving a partial motion to dismiss in December 2024 and class certification proceedings ongoing as of late 2025.climatecasechart.com
The greenwashing lawsuit specifically alleges Delta purchased credits from projects in India and Indonesia that critics argue have no verifiable additionality, undermining its entire carbon-neutrality claim.cbsnews.com
Community Reviews
No reviews yet. Be the first to share your experience!
ClimateTicker assessments are evidence-based research, not investment advice. Companies and readers can challenge a factual claim or submit better evidence.