FlightRecord

Houston (HOU) to Ontario (ONT): On-Time Performance

Data through July 2026

Houston (HOU) to Ontario (ONT) is a thinner route than most in this dataset — 362 departures over the past year, roughly 7 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 81% arrived on time.

On-time
81%
arrived <15 min late
Avg delay
12 min
completed flights
Cancelled
0.5%
Flights/day
0.99
last 12 months
Duration
3h 25m
scheduled
Distance
1,345 mi

Monthly on-time trend

Monthly on-time percentage for HOU to ONT flights50%75%100%August 2024: 90% on-time (31 flights)90Aug 2024September 2024: 90% on-time (29 flights)90October 2024: 90% on-time (31 flights)90November 2024: 93% on-time (29 flights)93Nov 2024December 2024: 77% on-time (31 flights)77January 2025: 86% on-time (31 flights)86February 2025: 93% on-time (28 flights)93Feb 2025March 2025: 87% on-time (31 flights)87April 2025: 93% on-time (30 flights)93May 2025: 77% on-time (31 flights)77May 2025June 2025: 77% on-time (30 flights)77July 2025: 97% on-time (31 flights)97August 2025: 83% on-time (30 flights)83Aug 2025September 2025: 90% on-time (30 flights)90October 2025: 73% on-time (30 flights)73November 2025: 72% on-time (29 flights)72Nov 2025December 2025: 81% on-time (31 flights)81January 2026: 90% on-time (31 flights)90February 2026: 86% on-time (28 flights)86Feb 2026March 2026: 77% on-time (31 flights)77April 2026: 80% on-time (30 flights)80May 2026: 77% on-time (31 flights)77May 2026June 2026: 57% on-time (30 flights)57July 2026: 65% on-time (31 flights)65

Best time to fly from HOU to ONT

Aim for departures around 9 a.m. (92% on-time); avoid 9 p.m. departures (63%).

On-time percentage by scheduled departure hour, HOU to ONT7 a.m.: 86% on-time (56 flights)78 a.m.: 89% on-time (208 flights)89 a.m.: 92% on-time (80 flights)910 a.m.: 85% on-time (26 flights)1011 a.m.: 86% on-time (28 flights)111 p.m.: 69% on-time (87 flights)132 p.m.: 76% on-time (63 flights)143 p.m.: 82% on-time (39 flights)154 p.m.: 87% on-time (23 flights)165 p.m.: 71% on-time (24 flights)176 p.m.: 67% on-time (24 flights)189 p.m.: 63% on-time (50 flights)21scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday81%15 min
Tuesdaybest87%7 min
Wednesday77%14 min
Thursday86%7 min
Friday84%11 min
Saturday81%13 min
Sunday75%15 min

What causes delays on this route

Share of total delay minutes by cause, as reported by carriers to the US DOT.

  • Late-arriving aircraft48%
  • Airline operations32%
  • National airspace system12%
  • Weather6%
  • Security2%

Frequently asked questions

How often are flights from HOU to ONT delayed?
19% of HOU–ONT 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 12 minutes.
What is the best time of day to fly from HOU to ONT?
Departures around 9 a.m. have the best record (92% on-time), while departures around 9 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from HOU to ONT?
The scheduled HOU–ONT flight time averages 3h 25m over 1,345 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
How often are HOU to ONT flights cancelled?
0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
What is the worst month to fly from HOU to ONT?
July 2024 was the roughest month in this dataset, with only 53% of arrivals on time. The best was July 2025 at 97%. If your dates are flexible, that 44-point gap is worth planning around.

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Based on 756 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.