Historical on-time performance
Houston to San Antonio
192 miData through May 2026Source: US DOT · BTS
Flights on HOU–SAT arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 1,408 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9035 minCancel0.0%Flights1,408
Why flights run late
Delay causes
- Airline30%
- Weather3%
- Air traffic (NAS)11%
- Late aircraft56%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline33%
- Weather58%
- Air traffic (NAS)9%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 89 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 HOU → SAT
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 — 91% on time.
- Mornings91% on time · p90 10 min · 1,006 flights
- Middays86% on time · p90 20 min · 1,035 flights
- Evenings77% on time · p90 40 min · 634 flights
- Afternoons71% on time · p90 45 min · 720 flights
- Overnights70% on time · p90 50 min · 1,282 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 82% on time.
- Wednesdays82% on time · p90 30 min · 641 flights
- Tuesdays82% on time · p90 30 min · 641 flights
- Saturdays81% on time · p90 25 min · 666 flights
- Fridays79% on time · p90 35 min · 674 flights
- Mondays78% on time · p90 35 min · 671 flights
- Sundays77% on time · p90 40 min · 708 flights
- Thursdays76% on time · p90 40 min · 676 flights
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