US flight delays report: June 2026
US airlines reported 607,577 scheduled domestic flights in June 2026. 74.3% arrived on time (down 4.3 pts from the previous month), and 1.6% were cancelled. Delta Air Lines was the most punctual airline (82.3%), and Southwest Airlines the least (66.0%).
On-time arrivals
74%
arrived < 15 min late
Cancelled
1.6%
10,019 flights
Avg arrival delay
20 min
74 min when late
1 hr+ late
9.7%
607,577 flights tracked
Airline rankings, June 2026
| # | Airline | On time | Cancelled | Avg delay | Flights |
|---|---|---|---|---|---|
| 1 | Delta Air Lines | 82.3% | 1.1% | 14 min | 90,247 |
| 2 | Republic Airways | 81.4% | 3.6% | 16 min | 30,929 |
| 3 | Alaska Airlines | 80.6% | 0.7% | 11 min | 29,891 |
| 4 | Envoy Air | 78.7% | 3.4% | 17 min | 29,207 |
| 5 | SkyWest Airlines | 77.6% | 1.4% | 19 min | 73,673 |
| 6 | JetBlue | 75.1% | 1.5% | 21 min | 20,804 |
| 7 | United Airlines | 74.7% | 0.6% | 20 min | 72,791 |
| 8 | PSA Airlines | 72.4% | 6.9% | 29 min | 20,871 |
| 9 | Frontier Airlines | 71.3% | 2.0% | 25 min | 19,104 |
| 10 | American Airlines | 69.9% | 2.6% | 29 min | 86,464 |
| 11 | Allegiant Air | 68.8% | 0.5% | 32 min | 12,663 |
| 12 | Southwest Airlines | 66.0% | 0.6% | 20 min | 120,933 |
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 aircraft42%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion20%
- Extreme weather7%
- Security0%
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June 2026. Methodology.