Route Reliability
Baltimore → Ontario
BWI–ONT · 2,283 miles · Baltimore/Washington International Thurgood Marshall Airport to Ontario International Airport
- 65%
- Arrive within 15 minutes
- 19 min
- Average arrival delay
- 0%
- Cancelled
- 277
- Flights in the data
Data through May 2026.
Southwest Airlines is the only airline in this data on this route, arriving on time 65% of the time across 277 flights. No comparison to make.
What the data says
Morning flights do better here.
BWI–ONT flights departing between 9 AM–12 PM arrived on time 84% of the time, versus 53% between 3–6 PM.
Saturdays have been rough.
BWI–ONT flights arrived on time 79% of the time on Wednesdays and just 55% on Saturdays. That gap is worth planning around.
It basically never cancels.
Out of 277 scheduled flights, only 0.0% were cancelled.
Trending in the right direction.
BWI–ONT flights arrived on time 64% of the time over the last three months in the data, compared with 53% in the three months before that.
Flights on this route
The breakdown
- Mon62%(39 flights)
- Tue67%(36 flights)
- Wed79%(34 flights)
- Thu68%(38 flights)
- Fri65%(43 flights)
- Sat55%(44 flights)
- Sun61%(43 flights)
- 9 AM–12 PM84%(57 flights)
- 12–3 PM68%(93 flights)
- 3–6 PM53%(75 flights)
- 6–9 PM54%(52 flights)
Jun 62% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 62% | 26 |
| July 2025 | 61% | 31 |
| August 2025 | 73% | 30 |
| September 2025 | 90% | 30 |
| October 2025 | 58% | 31 |
| November 2025 | 60% | 20 |
| December 2025 | 41% | 17 |
| March 2026 | 70% | 27 |
| April 2026 | 47% | 30 |
| May 2026 | 74% | 31 |
Same trip, other airports
Keep nerding
Based on 277 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.