FlightRecord

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

Data through May 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, 83% arrived on time.

On-time
83%
arrived <15 min late
Avg delay
11 min
completed flights
Cancelled
0.6%
Flights/day
0.99
last 12 months
Duration
3h 26m
scheduled
Distance
1,345 mi

Monthly on-time trend

Monthly on-time percentage for HOU to ONT flights50%75%100%June 2024: 73% on-time (30 flights)73Jun 2024July 2024: 53% on-time (31 flights)53August 2024: 90% on-time (31 flights)90September 2024: 90% on-time (29 flights)90Sep 2024October 2024: 90% on-time (31 flights)90November 2024: 93% on-time (29 flights)93December 2024: 77% on-time (31 flights)77Dec 2024January 2025: 86% on-time (31 flights)86February 2025: 93% on-time (28 flights)93March 2025: 87% on-time (31 flights)87Mar 2025April 2025: 93% on-time (30 flights)93May 2025: 77% on-time (31 flights)77June 2025: 77% on-time (30 flights)77Jun 2025July 2025: 97% on-time (31 flights)97August 2025: 83% on-time (30 flights)83September 2025: 90% on-time (30 flights)90Sep 2025October 2025: 73% on-time (30 flights)73November 2025: 72% on-time (29 flights)72December 2025: 81% on-time (31 flights)81Dec 2025January 2026: 90% on-time (31 flights)90February 2026: 86% on-time (28 flights)86March 2026: 77% on-time (31 flights)77Mar 2026April 2026: 80% on-time (30 flights)80May 2026: 77% on-time (31 flights)77

Best time to fly from HOU to ONT

Aim for departures around 7 a.m. (93% on-time); avoid 1 p.m. departures (69%).

On-time percentage by scheduled departure hour, HOU to ONT7 a.m.: 93% on-time (30 flights)78 a.m.: 89% on-time (207 flights)89 a.m.: 92% on-time (80 flights)910 a.m.: 82% on-time (34 flights)1011 a.m.: 86% on-time (28 flights)111 p.m.: 69% on-time (89 flights)132 p.m.: 75% on-time (74 flights)143 p.m.: 90% on-time (31 flights)154 p.m.: 85% on-time (27 flights)165 p.m.: 71% on-time (24 flights)176 p.m.: 71% on-time (28 flights)189 p.m.: 79% on-time (25 flights)21scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday81%16 min
Tuesdaybest90%5 min
Wednesday79%14 min
Thursday87%7 min
Friday84%11 min
Saturday82%12 min
Sunday78%11 min

What causes delays on this route

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

  • Late-arriving aircraft53%
  • Airline operations28%
  • National airspace system11%
  • Weather8%

Frequently asked questions

How often are flights from HOU to ONT delayed?
17% of HOU–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 11 minutes.
What is the best time of day to fly from HOU to ONT?
Departures around 7 a.m. have the best record (93% on-time), while departures around 1 p.m. have the worst (69%). 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 26m over 1,345 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
How often are HOU to ONT flights cancelled?
0.6% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, 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 725 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.