2021 Flight Delay Statistics
US aviation performance data for 2021
Total Flights
5,995,397
2021
On-Time Rate
82.0%
annual average
Avg Delay
0.0 min
when delayed
Cancel Rate
0.0%
flights cancelled
Best Month
2021-01
89.8% on-time rate
Worst Month
2021-07
74.7% on-time rate
Monthly On-Time Rate — 2021
Monthly Breakdown
| Month | Flights | On-Time | Avg Delay | Cancel % |
|---|---|---|---|---|
| 2021-01 | 361,428 | 89.8% | 7.1 min | 1.0% |
| 2021-02 | 332,468 | 81.3% | 9.8 min | 5.5% |
| 2021-03 | 444,476 | 89.1% | 6.8 min | 1.3% |
| 2021-04 | 450,637 | 89.3% | 7.5 min | 0.6% |
| 2021-05 | 495,544 | 86.8% | 9.6 min | 0.5% |
| 2021-06 | 546,124 | 75.7% | 17.4 min | 1.6% |
| 2021-07 | 583,258 | 74.7% | 18.6 min | 1.6% |
| 2021-08 | 579,179 | 75.7% | 16.2 min | 3.0% |
| 2021-09 | 538,051 | 85.7% | 9.5 min | 1.3% |
| 2021-10 | 564,788 | 80.9% | 12.2 min | 2.1% |
| 2021-11 | 547,559 | 85.1% | 9.7 min | 0.6% |
| 2021-12 | 551,885 | 76.7% | 15.0 min | 2.4% |
Data source: Bureau of Transportation Statistics (BTS) On-Time Performance dataset. Statistics are based on reported flight data from 2019-2025. See our data methodology for details.