Historical on-time performance
Ontario to Houston
1,345 miData through May 2026Source: US DOT · BTS
Flights on ONT–HOU arrive on time 67% of the time over the last 12 months.
On-time rate67%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 305 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time67%Medianon timep9035 minCancel0.0%Flights305
Why flights run late
Delay causes
- Airline35%
- Weather0%
- Air traffic (NAS)18%
- Late aircraft47%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 5 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ONT → HOU
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 94% on time.
- Mornings94% on time · p90 5 min · 417 flights
- Middays73% on time · p90 35 min · 433 flights
- Afternoons45% on time · p90 70 min · 107 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 88% on time.
- Tuesdays88% on time · p90 15 min · 138 flights · limited
- Saturdays88% on time · p90 20 min · 128 flights · limited
- Wednesdays83% on time · p90 25 min · 138 flights · limited
- Sundays78% on time · p90 25 min · 141 flights · limited
- Mondays76% on time · p90 30 min · 138 flights · limited
- Thursdays73% on time · p90 30 min · 136 flights · limited
- Fridays70% on time · p90 45 min · 138 flights · limited
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