FlightRecord

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

Data through May 2026

Ontario (ONT) to Houston (HOU) 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, 77% arrived on time.

On-time
77%
arrived <15 min late
Avg delay
12 min
completed flights
Cancelled
0.4%
Flights/day
0.99
last 12 months
Duration
3h 3m
scheduled
Distance
1,345 mi

Monthly on-time trend

Monthly on-time percentage for ONT to HOU flights50%75%100%June 2024: 90% on-time (30 flights)90Jun 2024July 2024: 83% on-time (31 flights)83August 2024: 90% on-time (31 flights)90September 2024: 100% on-time (29 flights)100Sep 2024October 2024: 90% on-time (31 flights)90November 2024: 83% on-time (29 flights)83December 2024: 74% on-time (31 flights)74Dec 2024January 2025: 83% on-time (31 flights)83February 2025: 93% on-time (28 flights)93March 2025: 87% on-time (31 flights)87Mar 2025April 2025: 83% on-time (30 flights)83May 2025: 74% on-time (31 flights)74June 2025: 80% on-time (30 flights)80Jun 2025July 2025: 71% on-time (31 flights)71August 2025: 93% on-time (30 flights)93September 2025: 97% on-time (30 flights)97Sep 2025October 2025: 70% on-time (30 flights)70November 2025: 69% on-time (29 flights)69December 2025: 65% on-time (31 flights)65Dec 2025January 2026: 87% on-time (31 flights)87February 2026: 71% on-time (28 flights)71March 2026: 26% on-time (31 flights)26Mar 2026April 2026: 40% on-time (30 flights)40May 2026: 42% on-time (31 flights)42

Best time to fly from ONT to HOU

Aim for departures around 7 a.m. (97% on-time); avoid 2 p.m. departures (36%).

On-time percentage by scheduled departure hour, ONT to HOU5 a.m.: 95% on-time (107 flights)56 a.m.: 96% on-time (51 flights)67 a.m.: 97% on-time (64 flights)78 a.m.: 91% on-time (109 flights)89 a.m.: 100% on-time (23 flights)910 a.m.: 86% on-time (30 flights)1011 a.m.: 79% on-time (57 flights)1112 p.m.: 61% on-time (82 flights)121 p.m.: 59% on-time (109 flights)132 p.m.: 36% on-time (88 flights)14scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday72%15 min
Tuesdaybest86%8 min
Wednesday81%10 min
Thursday72%10 min
Friday66%22 min
Saturday85%8 min
Sunday75%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 operations36%
  • National airspace system19%

Frequently asked questions

How often are flights from ONT to HOU delayed?
23% of ONT–HOU 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 12 minutes.
What is the best time of day to fly from ONT to HOU?
Departures around 7 a.m. have the best record (97% on-time), while departures around 2 p.m. have the worst (36%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from ONT to HOU?
The scheduled ONT–HOU flight time averages 3h 3m over 1,345 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
How often are ONT to HOU flights cancelled?
0.4% 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 ONT to HOU?
March 2026 was the roughest month in this dataset, with only 26% of arrivals on time. The best was September 2024 at 100%. If your dates are flexible, that 74-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.