US flight delays report: September 2025
US airlines reported 562,439 scheduled domestic flights in September 2025. 83.4% arrived on time (up 5.9 pts from the previous month), and 0.5% were cancelled. Hawaiian Airlines was the most punctual airline (88.4%), and American Airlines the least (79.1%).
On-time arrivals
83%
arrived < 15 min late
Cancelled
0.5%
2,886 flights
Avg arrival delay
12 min
67 min when late
1 hr+ late
5.4%
562,439 flights tracked
Airline rankings, September 2025
| # | Airline | On time | Cancelled | Avg delay | Flights |
|---|---|---|---|---|---|
| 1 | Hawaiian Airlines | 88.4% | 0.2% | 8 min | 6,428 |
| 2 | Delta Air Lines | 87.6% | 0.1% | 9 min | 84,875 |
| 3 | SkyWest Airlines | 84.7% | 0.4% | 11 min | 69,406 |
| 4 | Spirit Airlines | 84.2% | 0.9% | 13 min | 15,058 |
| 5 | Envoy Air | 84.1% | 0.8% | 11 min | 25,170 |
| 6 | PSA Airlines | 83.7% | 0.8% | 14 min | 19,218 |
| 7 | Alaska Airlines | 83.6% | 0.6% | 9 min | 20,747 |
| 8 | Republic Airways | 83.3% | 1.4% | 12 min | 28,284 |
| 9 | United Airlines | 83.0% | 0.3% | 12 min | 67,550 |
| 10 | Allegiant Air | 83.0% | 0.0% | 14 min | 6,925 |
| 11 | Southwest Airlines | 83.0% | 0.2% | 10 min | 110,361 |
| 12 | Frontier Airlines | 79.6% | 0.3% | 17 min | 14,896 |
| 13 | JetBlue | 79.2% | 0.6% | 15 min | 16,215 |
| 14 | American Airlines | 79.1% | 1.2% | 19 min | 77,306 |
Most delayed major airports
Airports with 100+ departures a day.
Most on-time major airports
Most delayed busy routes
Routes with 5+ flights a day.
Most cancelled busy routes
What caused delays this month
- Late-arriving aircraft37%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion23%
- Extreme weather6%
- Security0%
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, September 2025. Methodology.