Historical on-time performance
San Francisco to San Antonio
1,482 miData through Dec 2025Source: US DOT · BTS
Flights on SFO–SAT arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 400 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time77%Medianon timep9040 minCancel0.0%Flights122
- SkyWest AirlinesOn-time85%Medianon timep9020 minCancel0.0%Flights278
Why flights run late
Delay causes
- Airline34%
- Weather3%
- Air traffic (NAS)30%
- Late aircraft32%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SFO → SAT
All airlines · rolling 36 months (2023-01 .. 2025-12).
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 · 254 flights
- Evenings84% on time · p90 30 min · 619 flights
- Middays78% on time · p90 40 min · 207 flights
- Afternoons78% on time · p90 30 min · 224 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 89% on time.
- Saturdays89% on time · p90 15 min · 167 flights · limited
- Wednesdays87% on time · p90 25 min · 189 flights · limited
- Mondays85% on time · p90 20 min · 191 flights · limited
- Tuesdays83% on time · p90 30 min · 181 flights · limited
- Fridays81% on time · p90 35 min · 191 flights · limited
- Sundays80% on time · p90 35 min · 194 flights · limited
- Thursdays80% on time · p90 50 min · 192 flights · limited
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