Baltimore (BWI) to Ontario (ONT): On-Time Performance
Data through May 2026
Baltimore (BWI) to Ontario (ONT) is a thinner route than most in this dataset — 277 departures over the past year, roughly 5 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 64% arrived on time, noticeably below the national average of 78%.
- On-time
- 64%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 0.0%
- Flights/day
- 0.76
- last 12 months
- Duration
- 5h 28m
- scheduled
- Distance
- 2,283 mi
Monthly on-time trend
Best time to fly from BWI to ONT
Aim for departures around 9 a.m. (86% on-time); avoid 3 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 62% | 27 min |
| Tuesday | 64% | 23 min |
| Wednesdaybest | 79% | 8 min |
| Thursday | 66% | 23 min |
| Friday | 65% | 19 min |
| Saturday | 52% | 38 min |
| Sunday | 61% | 25 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft29%
- Airline operations44%
- National airspace system23%
- Weather5%
Frequently asked questions
- How often are flights from BWI to ONT delayed?
- 37% of BWI–ONT flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 24 minutes.
- What is the best time of day to fly from BWI to ONT?
- Departures around 9 a.m. have the best record (86% on-time), while departures around 3 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BWI to ONT?
- The scheduled BWI–ONT flight time averages 5h 28m over 2,283 miles. Actual arrival times vary — flights on this route land 15+ minutes late 37% of the time.
- How often are BWI to ONT flights cancelled?
- 0% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What day of the week is most reliable for BWI to ONT?
- Wednesday flights have the best record at 79% on-time. Day-of-week differences on this route are meaningful — Saturday trails at 52%.
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Based on 277 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.