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Southwest Airlines
In 2025 Southwest Airlines flew 64.3 passenger-miles per gallon of jet fuel, ranking 10 of 13. That is 5% worse than the all-airline figure that year. Since 2000 its figure has risen 54%.
64.3passenger-miles per gallon, 2025
0.152 kgCO2 per passenger-mile, 2025
77%of seats filled, 2025
2,169 milliongallons of jet fuel burned in scheduled passenger flying, 2025
Southwest and AirTran began reporting jointly in January 2015. In 2012 to 2014 AirTran filed its traffic under its own code while its fuel was already reported by Southwest, so those years count AirTran with Southwest.
Year by year
| Year | Passenger-miles per gallon | kg CO2 per passenger-mile | Seat-miles per gallon | Load factor | Passengers (millions) | Fuel (million gallons) | CO2 (thousand tonnes) |
|---|---|---|---|---|---|---|---|
| 2025 | 64.3 | 0.152 | 83.0 | 77.5% | 169.8 | 2,169 | 21,147 |
| 2024 | 65.0 | 0.150 | 80.8 | 80.4% | 177.6 | 2,194 | 21,388 |
| 2023 | 63.6 | 0.153 | 79.5 | 80.0% | 176.4 | 2,143 | 20,898 |
| 2022 | 64.4 | 0.151 | 77.3 | 83.4% | 161.9 | 1,922 | 18,738 |
| 2021 | 62.1 | 0.157 | 79.2 | 78.5% | 127.1 | 1,668 | 16,261 |
| 2020 | 43.7 | 0.223 | 85.1 | 51.4% | 71.5 | 1,273 | 12,413 |
| 2019 | 63.3 | 0.154 | 75.7 | 83.5% | 166.8 | 2,077 | 20,246 |
| 2018 | 63.7 | 0.153 | 76.3 | 83.4% | 167.9 | 2,094 | 20,420 |
| 2017 | 63.1 | 0.154 | 75.2 | 83.9% | 162.4 | 2,045 | 19,934 |
| 2016 | 62.5 | 0.156 | 74.4 | 84.0% | 156.2 | 1,996 | 19,460 |
| 2015 | 61.8 | 0.158 | 73.9 | 83.6% | 149.9 | 1,901 | 18,532 |
| 2014 | 60.0 | 0.163 | 72.8 | 82.4% | 142.5 | 1,801 | 17,557 |
| 2013 | 57.4 | 0.170 | 71.7 | 80.0% | 140.2 | 1,818 | 17,730 |
| 2012 | 55.6 | 0.175 | 69.3 | 80.3% | 141.7 | 1,851 | 18,043 |
| 2011 | 55.6 | 0.175 | 68.9 | 80.8% | 119.4 | 1,507 | 14,692 |
| 2010 | 54.3 | 0.179 | 68.5 | 79.3% | 114.2 | 1,437 | 14,008 |
| 2009 | 52.1 | 0.187 | 68.6 | 76.0% | 109.6 | 1,428 | 13,922 |
| 2008 | 48.6 | 0.200 | 68.4 | 71.2% | 110.9 | 1,511 | 14,730 |
| 2007 | 48.5 | 0.201 | 66.8 | 72.6% | 110.6 | 1,491 | 14,535 |
| 2006 | 48.7 | 0.200 | 66.7 | 73.0% | 103.9 | 1,390 | 13,552 |
| 2005 | 46.8 | 0.208 | 66.2 | 70.7% | 95.7 | 1,287 | 12,552 |
| 2004 | 44.5 | 0.219 | 64.0 | 69.5% | 88.8 | 1,201 | 11,706 |
| 2003 | 42.0 | 0.232 | 62.8 | 66.8% | 81.9 | 1,143 | 11,141 |
| 2002 | 40.9 | 0.239 | 62.0 | 65.9% | 80.3 | 1,111 | 10,832 |
| 2001 | 41.0 | 0.238 | 60.3 | 68.0% | 82.2 | 1,085 | 10,582 |
| 2000 | 41.7 | 0.234 | 59.1 | 70.5% | 82.2 | 1,013 | 9,881 |