United Airlines

United Airlines, a US-based air transport services company, reported total carbon emissions of approximately 54.73 billion kg CO2e in 2025. This includes about 39.98 billion kg CO2e from Scope 1 emissions, 143.72 million kg CO2e from Scope 2 emissions (market-based), and 8.48 billion kg CO2e from Scope 3 emissions.

In 2024, United Airlines's total emissions were approximately 52.24 billion kg CO2e, comprising around 38.52 billion kg CO2e from Scope 1, 134.50 million kg CO2e from Scope 2 (market-based), and 7.97 billion kg CO2e from Scope 3. For 2023, the company's total emissions were approximately 49.40 billion kg CO2e, with Scope 1 at about 36.59 billion kg CO2e, Scope 2 (market-based) at around 144.02 million kg CO2e, and Scope 3 at about 7.67 billion kg CO2e.

United Airlines is committed to achieving net-zero emissions by 2050, encompassing all scopes. This commitment includes an ambitious goal to reduce its greenhouse gas emissions by 100% by 2050. The company also aims to reduce its carbon intensity for Scope 1, Scope 2, and Scope 3 emissions by 50% by 2035, compared to a 2019 baseline. This intensity target specifically addresses well-to-wake jet fuel greenhouse gas emissions, including Scope 3 category 4 (upstream transportation and distribution), per revenue ton kilometre (RTK).

United Airlines's Science Based Targets initiative (SBTi) commitments reflect these long-term goals. While the aviation sector's specific SBTi methodology is still under development, the company's internal analysis indicates alignment with Science-Based Targets. United Airlines is actively investing in sustainable aviation fuels (SAF) and revolutionary Direct Air Capture (DAC) technology to achieve its climate objectives.