Historical on-time performance
San Antonio to San Francisco
1,482 miData through Dec 2025Source: US DOT · BTS
Flights on SAT–SFO arrive on time 90% of the time over the last 12 months.
On-time rate90%arrived within 15 min
p90 delay10 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 401 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-time93%Medianon timep90on timeCancel0.0%Flights122
- SkyWest AirlinesOn-time89%Medianon timep9020 minCancel0.4%Flights279
Why flights run late
Delay causes
- Airline33%
- Weather1%
- Air traffic (NAS)43%
- Late aircraft23%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAT → SFO
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 · 864 flights
- Evenings75% on time · p90 85 min · 226 flights
- Afternoons73% on time · p90 75 min · 217 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 91% on time.
- Saturdays91% on time · p90 10 min · 174 flights · limited
- Tuesdays88% on time · p90 15 min · 187 flights · limited
- Wednesdays87% on time · p90 15 min · 179 flights · limited
- Sundays85% on time · p90 30 min · 184 flights · limited
- Mondays84% on time · p90 45 min · 196 flights · limited
- Fridays82% on time · p90 40 min · 194 flights · limited
- Thursdays79% on time · p90 90 min · 193 flights · limited
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