The Department of Transportation said Wednesday that 80% of domestic flights arrived on-time in October, down from 81.1% in September and 84.1% in October of last year.

Industry trade group Airlines for America says many of the delays were due to a fire that reduced operations at an air traffic control centre in Chicago for 12 days in late September and early October.

Here are the government’s rankings of the leading airlines and their on-time performance for October. Some airlines, including Spirit and Allegiant, are not included because they operate fewer flights. The federal government counts a flight as on-time if it arrives within 14 minutes of schedule.

1. Hawaiian Airlines, 89.7 per cent

2. Alaska Airlines, 87.2 per cent

3. AirTran Airways, 87.0 per cent

4. Delta Air Lines, 86.8 per cent

5. JetBlue Airways, 83.7 per cent

6. Virgin America, 83.6 per cent

7. US Airways, 83.3 per cent

8. Frontier Airlines, 83.3 per cent

9. SkyWest, 80.9 per cent

10. Southwest Airlines, 80.3 per cent

11. United Airlines, 77.4 per cent

12. American Airlines, 76.1 per cent

13. ExpressJet, 75.4 per cent

14. Envoy Air, 66.2 per cent

About 1.1 per cent of October flights were cancelled. That was better than September but worse than the previous October.