Which times of the year tend to have on-time flights? For each month, this shows the percentage of flights that month which are late.
This is calculated from historical data from July 2014 through June 2015.
- Failure Rate: The percentage of flights that are cancelled or diverted. (Overall in U.S.: 1.8%)
- Delay Rate: The percentage of flights that arrive more than 1 hour after their scheduled arrival time, or fail to arrive at all. (Overall in U.S.: 7.5%)
| month | Num. Flights | Failure Rate | Delay Rate |
|---|---|---|---|
| 01 | 393,973 | 2.6% | 8.3% |
| 02 | 359,314 | 4.7% | 11.3% |
| 03 | 422,910 | 2.3% | 7.5% |
| 04 | 410,059 | 1.1% | 5.7% |
| 05 | 421,425 | 1.4% | 7.0% |
| 06 | 424,327 | 2.1% | 10.0% |
| 07 | 433,643 | 1.8% | 8.8% |
| 08 | 421,319 | 1.2% | 7.3% |
| 09 | 391,590 | 1.4% | 5.9% |
| 10 | 412,325 | 1.0% | 6.0% |
| 11 | 389,226 | 0.9% | 5.6% |
| 12 | 401,624 | 1.2% | 7.1% |