US Flight Delays in December 2025
By Sharon Ben-Moshe · US DOT data · last updated 2026-07-01
In December 2025, US airlines operated 582,304 domestic flights and 73% arrived on time, down 6.2 points from November 2025. United Airlines led the reporting carriers at 77% on time; JetBlue Airways trailed at 64%.
- Flights
- 582,304
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 21 min
- Cancelled
- 1.6%
- vs Nov 2025
- -6.2 pts
- on-time change
Airline on-time rates in December 2025
Reporting carriers with at least 1,000 flights in the month.
| Airline | On-time | vs prior month | Avg delay | Flights |
|---|---|---|---|---|
| United Airlines | 77% | -2.1 pts | 17 min | 65,865 |
| Envoy Air | 76% | -5.6 pts | 16 min | 25,437 |
| Southwest Airlines | 75% | -4.4 pts | 14 min | 118,075 |
| Delta Air Lines | 74% | -7.9 pts | 20 min | 85,139 |
| American Airlines | 74% | -2.9 pts | 22 min | 79,859 |
| SkyWest Airlines | 73% | -9.2 pts | 30 min | 68,814 |
| Hawaiian Airlines | 72% | -9.6 pts | 18 min | 6,705 |
| Alaska Airlines | 72% | -9.3 pts | 16 min | 21,102 |
| Republic Airways | 69% | -7.2 pts | 24 min | 30,203 |
| Allegiant Air | 69% | -8.0 pts | 26 min | 11,516 |
| Frontier Airlines | 69% | -7.3 pts | 28 min | 16,724 |
| Spirit Airlines | 66% | -12.3 pts | 27 min | 11,800 |
| PSA Airlines | 64% | -10.6 pts | 36 min | 20,505 |
| JetBlue Airways | 64% | -11.2 pts | 29 min | 20,560 |
Most delayed large airports
Most reliable large airports
Most delay-prone routes in December 2025
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 582,304 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.