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Route Reliability

Ontario → Houston

ONT–HOU · 1,345 miles · Ontario International Airport to William P. Hobby Airport

75
Usually Fine
WanderNerd Reliability Score
70%
Arrive within 15 minutes
13 min
Average arrival delay
0%
Cancelled
362
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 70% of the time across 362 flights. No comparison to make.

What the data says

Morning flights do better here.

ONT–HOU flights departing between 6–9 AM arrived on time 98% of the time, versus 49% between 12–3 PM.

Friday is doing you no favors.

ONT–HOU flights arrived on time 87% of the time on Tuesdays and just 51% on Fridays. That gap is worth planning around.

It basically never cancels.

Out of 362 scheduled flights, only 0.0% were cancelled.

Recent months have been rougher.

ONT–HOU flights arrived on time 39% of the time over the last three months in the data, compared with 77% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon64%(52 flights)
  • Tue87%(52 flights)
  • Wed79%(52 flights)
  • Thu65%(51 flights)
  • Fri51%(51 flights)
  • Sat77%(52 flights)
  • Sun67%(51 flights)
On-time by departure window
  • 3–6 AM96%(83 flights)
  • 6–9 AM98%(59 flights)
  • 9 AM–12 PM83%(18 flights)
  • 12–3 PM49%(201 flights)
On-time trend by month
48%
May

Jun 83% → May 48% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%29
July 202574%31
August 202593%30
September 2025100%30
October 202573%30
November 202569%29
December 202565%31
January 202690%31
February 202675%28
March 202626%31
April 202643%30
May 202648%31

Same trip, other airports

Keep nerding

Based on 362 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.