Historical on-time performance
Houston to San Jose
1,608 miData through May 2026Source: US DOT · BTS
Flights on IAH–SJC arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 152 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time82%Medianon timep9040 minCancel0.7%Flights152
Why flights run late
Delay causes
- Airline46%
- Weather2%
- Air traffic (NAS)28%
- Late aircraft24%
- Security0%
Most delay minutes here are attributed to Airline.
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 1 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 IAH → SJC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 60% to 88% on time.
- Mornings88% on time · p90 20 min · 333 flights
- Middays86% on time · p90 25 min · 169 flights · limited
- Evenings73% on time · p90 55 min · 166 flights · limited
- Overnights60% on time · p90 85 min · 141 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 85% on time.
- Saturdays85% on time · p90 30 min · 109 flights · limited
- Tuesdays82% on time · p90 35 min · 115 flights · limited
- Sundays81% on time · p90 45 min · 117 flights · limited
- Thursdays79% on time · p90 30 min · 118 flights · limited
- Mondays79% on time · p90 65 min · 118 flights · limited
- Wednesdays78% on time · p90 45 min · 115 flights · limited
- Fridays73% on time · p90 75 min · 118 flights · limited
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