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United Airlines

In 2025 United Airlines flew 65.5 passenger-miles per gallon of jet fuel, ranking 8 of 13. That is 3% worse than the all-airline figure that year. Since 2000 its figure has risen 65%.

65.5passenger-miles per gallon, 2025
0.149 kgCO2 per passenger-mile, 2025
82%of seats filled, 2025
4,156 milliongallons of jet fuel burned in scheduled passenger flying, 2025
United Airlines: passenger-miles per gallon by yearLine chart of United Airlines passenger-miles per gallon of fuel from 2000 to 2025, with the all-airline average for comparison.3040506070200020052010201520202025Passenger-miles per gallonAll airlinesUnited Airlines
United Airlines against the all-airline figure, 2000 to 2025.

United Airlines sells seats on flights operated by regional partners, mainly SkyWest Airlines, Mesa Airlines, and Republic Airways. In 2025 about 6.7% of its seat-miles were flown by regionals. How much of each regional's flying belongs to United Airlines is an estimate based on the hubs the regional serves. The figure for 2025 sits between 65.3 and 65.5 passenger-miles per gallon depending on how multi-airline regionals are split. See the methodology.

BTS began combining United and Continental filings in January 2012. Continental Airlines has its own page for 2000 to 2011, so the United line includes Continental from 2012 on.

Year by year

YearPassenger-miles per gallonkg CO2 per passenger-mileSeat-miles per gallonLoad factorPassengers (millions)Fuel (million gallons)CO2 (thousand tonnes)
2025 65.5 0.149 79.8 82.1% 184.0 4,156 40,518
2024 64.6 0.151 77.8 83.0% 171.9 3,982 38,822
2023 64.2 0.152 76.5 83.8% 162.3 3,780 36,857
2022 64.6 0.151 77.4 83.4% 137.3 3,134 30,558
2021 54.7 0.178 76.4 71.6% 90.7 2,200 21,452
2020 42.1 0.231 70.3 59.9% 46.9 1,594 15,543
2019 64.0 0.152 76.1 84.1% 146.1 3,572 34,824
2018 63.5 0.153 76.0 83.6% 141.9 3,456 33,694
2017 61.3 0.159 74.3 82.5% 132.8 3,364 32,796
2016 60.0 0.163 72.4 82.9% 121.3 3,270 31,884
2015 60.0 0.162 71.9 83.4% 118.8 3,244 31,631
2014 59.4 0.164 71.1 83.6% 120.6 3,258 31,765
2013 59.2 0.165 70.7 83.7% 121.1 3,254 31,728
2012 58.3 0.167 70.5 82.7% 130.1 3,366 32,819
2011 53.3 0.183 63.7 83.7% 60.3 1,924 18,763
2010 53.6 0.182 64.1 83.6% 69.4 2,013 19,622
2009 52.8 0.185 64.9 81.3% 78.0 2,066 20,140
2008 50.5 0.193 62.8 80.5% 84.8 2,344 22,852
2007 49.9 0.195 60.6 82.3% 92.4 2,544 24,801
2006 48.6 0.201 59.5 81.7% 93.5 2,586 25,216
2005 47.6 0.205 58.9 80.8% 90.8 2,571 25,066
2004 45.9 0.213 58.3 78.6% 90.1 2,612 25,467
2003 45.1 0.216 59.0 76.3% 78.1 2,355 22,963
2002 43.3 0.225 58.9 73.5% 74.1 2,515 24,522
2001 39.4 0.247 55.7 70.7% 79.6 2,918 28,446
2000 39.8 0.245 55.2 72.1% 88.6 3,154 30,755

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