Ontario (ONT) Delays
#51 U.S. airport by BTS-tracked flight volume · 81.2% on-time departures, 77.6% on-time arrivals over the last 12 months · 2015–2026
25,874Flights
81.2%Departures on-time
13.6 minAvg dep. delay
77.6%Arrivals on-time
14.2 minAvg arr. delay
0.9%Cancelled
Delay causes (last 12 months)
- Air carrier31.9%
- Extreme weather1.8%
- National Aviation System21.4%
- Security0.2%
- Late-arriving aircraft44.6%
By year
| Year | Flights | Dep on-time | Arr on-time | Avg dep delay | Cancelled |
|---|---|---|---|---|---|
| 2026 | 10,124 | 82.4% | 80.8% | 12.1 min | 0.8% |
| 2025 | 26,162 | 82.4% | 78.2% | 13 min | 0.9% |
| 2024 | 26,175 | 83.6% | 79.9% | 12.4 min | 0.9% |
| 2023 | 24,324 | 81.5% | 76.9% | 14 min | 1.1% |
| 2022 | 23,571 | 81.6% | 78.3% | 12.4 min | 2% |
| 2021 | 20,141 | 83.2% | 80.4% | 12.1 min | 1.5% |
| 2020 | 16,051 | 93% | 91.9% | 5.3 min | 6.2% |
| 2019 | 22,608 | 84.1% | 81.6% | 10.6 min | 1.5% |
| 2018 | 21,279 | 83.4% | 80.9% | 10.6 min | 0.7% |
| 2017 | 20,852 | 81.1% | 79.4% | 12.6 min | 1.2% |
| 2016 | 19,642 | 83.3% | 81.6% | 11 min | 1.1% |
| 2015 | 19,720 | 82.4% | 80.3% | 11.1 min | 1% |
On-time = arrival within 15 minutes of schedule, per U.S. DOT definitions. Source: Bureau of Transportation Statistics (public domain). Delay-cause attribution is reported by carriers since June 2003.