Historical on-time performance
San Diego to Houston
1,303 miData through Dec 2025Source: US DOT · BTS
Flights on SAN–IAH arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 1,673 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time83%Medianon timep9025 minCancel1.0%Flights1,673
Why flights run late
Delay causes
- Airline18%
- Weather2%
- Air traffic (NAS)29%
- Late aircraft51%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAN → IAH
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 80% to 86% on time.
- Mornings86% on time · p90 15 min · 1,277 flights
- Evenings85% on time · p90 30 min · 252 flights
- Middays81% on time · p90 30 min · 2,851 flights
- Afternoons80% on time · p90 35 min · 914 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 84% on time.
- Saturdays84% on time · p90 25 min · 687 flights
- Tuesdays84% on time · p90 20 min · 719 flights
- Wednesdays83% on time · p90 30 min · 774 flights
- Thursdays83% on time · p90 35 min · 775 flights
- Fridays81% on time · p90 30 min · 774 flights
- Mondays81% on time · p90 30 min · 786 flights
- Sundays79% on time · p90 35 min · 779 flights
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