Ontario (ONT) to Baltimore (BWI): On-Time Performance
Data through July 2026
Ontario (ONT) to Baltimore (BWI) is a thinner route than most in this dataset — 281 departures over the past year, roughly 5 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 82% arrived on time.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 0.77
- last 12 months
- Duration
- 4h 48m
- scheduled
- Distance
- 2,283 mi
Monthly on-time trend
Best time to fly from ONT to BWI
Aim for departures around 10 a.m. (94% on-time); avoid 12 p.m. departures (78%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 11 min |
| Tuesday | 78% | 11 min |
| Wednesday | 88% | 6 min |
| Thursday | 77% | 10 min |
| Friday | 85% | 6 min |
| Saturdaybest | 90% | 9 min |
| Sunday | 78% | 10 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations39%
- National airspace system16%
Frequently asked questions
- How often are flights from ONT to BWI delayed?
- 18% of ONT–BWI flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 9 minutes.
- What is the best time of day to fly from ONT to BWI?
- Departures around 10 a.m. have the best record (94% on-time), while departures around 12 p.m. have the worst (78%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ONT to BWI?
- The scheduled ONT–BWI flight time averages 4h 48m over 2,283 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are ONT to BWI flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What day of the week is most reliable for ONT to BWI?
- Saturday flights have the best record at 90% on-time. Day-of-week differences on this route are meaningful — Thursday trails at 77%.
Explore related pages
More routes from ONT
Other ways to fly to Baltimore (BWI)
Related guides
Based on 338 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.