Historical on-time performance
San Antonio to Houston
Flights on SAT–IAH arrive on time 81% of the time over the last 12 months.
based on 2,361 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time81%Medianon timep9030 minCancel1.0%Flights2,361
Why flights run late
Delay causes
- Airline22%
- Weather2%
- Air traffic (NAS)47%
- Late aircraft29%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline30%
- Weather61%
- Air traffic (NAS)9%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 23 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 SAT → IAH
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 76% to 86% on time.
- Mornings86% on time · p90 15 min · 2,878 flights
- Middays84% on time · p90 30 min · 791 flights
- Afternoons78% on time · p90 45 min · 1,436 flights
- Evenings76% on time · p90 45 min · 1,737 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 85% on time.
- Saturdays85% on time · p90 25 min · 951 flights
- Tuesdays83% on time · p90 25 min · 982 flights
- Wednesdays83% on time · p90 25 min · 986 flights
- Mondays83% on time · p90 30 min · 992 flights
- Thursdays80% on time · p90 35 min · 981 flights
- Sundays79% on time · p90 35 min · 957 flights
- Fridays79% on time · p90 40 min · 994 flights
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