Most delayed airlines in the US

The US carriers that run late most often, across the busiest domestic routes we track.

1. 1Southwest328 routes · 46,242 flights29%
2. 2Frontier197 routes · 11,018 flights25%
3. 3American328 routes · 53,535 flights24%
4. 4SkyWest200 routes · 24,062 flights22%
5. 5United314 routes · 46,141 flights21%
6. 6Alaska98 routes · 15,425 flights20%
7. 7JetBlue76 routes · 8,570 flights20%
8. 8Delta326 routes · 55,842 flights19%
9. 9Envoy108 routes · 9,054 flights18%
10. 10Republic112 routes · 13,440 flights17%

Ranked by share of the carrier's flights on the US routes we track arriving 15+ minutes late. These are historical figures, not a forecast for any specific flight. Source: US BTS on-time data, June 2024.