US Flight Delays in December 2024
By Sharon Ben-Moshe · US DOT data · last updated 2026-07-01
In December 2024, US airlines operated 590,581 domestic flights and 79% arrived on time, down 6.6 points from November 2024. Hawaiian Airlines led the reporting carriers at 84% on time; JetBlue Airways trailed at 69%.
- Flights
- 590,581
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 16 min
- Cancelled
- 0.7%
- vs Nov 2024
- -6.6 pts
- on-time change
Airline on-time rates in December 2024
Reporting carriers with at least 1,000 flights in the month.
| Airline | On-time | vs prior month | Avg delay | Flights |
|---|---|---|---|---|
| Hawaiian Airlines | 84% | -5.6 pts | 9 min | 6,699 |
| Republic Airways | 82% | -6.1 pts | 12 min | 27,279 |
| United Airlines | 81% | -1.7 pts | 14 min | 64,030 |
| Southwest Airlines | 80% | -6.9 pts | 13 min | 116,276 |
| Endeavor Air | 80% | -9.9 pts | 15 min | 17,351 |
| Delta Air Lines | 80% | -8.5 pts | 14 min | 83,283 |
| Envoy Air | 80% | -7.2 pts | 15 min | 22,584 |
| Alaska Airlines | 78% | -4.9 pts | 13 min | 20,027 |
| SkyWest Airlines | 78% | -3.6 pts | 20 min | 66,601 |
| Spirit Airlines | 78% | -8.1 pts | 16 min | 18,662 |
| American Airlines | 77% | -6.4 pts | 20 min | 77,737 |
| Frontier Airlines | 76% | -1.9 pts | 19 min | 17,294 |
| Allegiant Air | 73% | -11.3 pts | 28 min | 11,084 |
| PSA Airlines | 72% | -14.1 pts | 25 min | 20,903 |
| JetBlue Airways | 69% | -15.1 pts | 24 min | 20,771 |
Most delayed large airports
Most reliable large airports
Most delay-prone routes in December 2024
Routes with at least 60 flights in the month.
National figures are flight-weighted averages across all reporting carriers for the month; see the methodology for definitions and limitations.
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Based on 590,581 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.