For the first time, aircraft lessors can benchmark their environmental performance against industry peers using comprehensive, flight-level emissions data. In collaboration with Airline Economics, Estuaire has analyzed 8.3 million flights across the top 25 aircraft lessors, covering 8,462 aircraft that collectively emit 145 million tonnes of CO₂ annually.
The 2024 Aircraft Lessor Sustainability Index provides unprecedented transparency into how portfolio composition, aircraft types, seating configurations, and operator utilization patterns drive carbon intensity differences across the leasing industry. Our analysis reveals that most lessors cluster around 900-950 grams CO₂-equivalent per revenue tonne kilometer (gCO₂e/RTK)—but the variations matter significantly for ESG reporting, investor expectations, and competitive positioning.
What sets this benchmark apart: Unlike generic fleet emissions estimates, our methodology uses weather-corrected, flight-level precision data spanning January to June 2024. This granular approach captures real operational performance, not theoretical efficiency claims. Whether you're a lessor evaluating portfolio strategy, an airline selecting financing partners, or an investor assessing aviation exposure, this index provides the credible emissions intelligence that sustainability commitments demand.
Want to see where your lessor ranks and access the complete methodology? Request the full 2025 Aircraft Lessor Sustainability Index and discover how fleet composition and operator choice shape environmental performance across aviation finance.
Developed by Estuaire in partnership with Airline Economics +, combining leading aviation finance expertise with advanced emissions modeling and flight operations analysis.
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