Here are the government’s rankings of the leading U.S. airlines and their on-time performance for August. The federal government counts a flight as on time if it arrives no more than 14 minutes behind schedule.

1. Hawaiian Airlines, 93.0 percent

2. Delta Air Lines 87.4 percent

3. Alaska Airlines, 82.8 percent

4. American Airlines, 77.7 percent

5. SkyWest Airlines, 77.5 percent

6. United Airlines, 77.5 percent

7. Frontier Airlines, 77.2 percent

8. Spirit Airlines, 76.9 percent

9. ExpressJet, 74.1 percent

10. Southwest Airlines, 70.2 percent

11. JetBlue Airways, 68.1 percent

12. Virgin America, 66.7 percent

Total for all covered airlines: 77.1 percent

Source: U.S. Department of Transportation

The report does not cover smaller airlines including Allegiant Air and some regional carriers.

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