Historical on-time performance
Pittsburgh to San Francisco
2,254 miData through Dec 2025Source: US DOT · BTS
Flights on PIT–SFO arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 541 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time84%Medianon timep9030 minCancel0.6%Flights541
Why flights run late
Delay causes
- Airline33%
- Weather5%
- Air traffic (NAS)39%
- 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 PIT → 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 — 88% on time.
- Mornings88% on time · p90 15 min · 993 flights
- Evenings72% on time · p90 70 min · 641 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 85% on time.
- Tuesdays85% on time · p90 40 min · 214 flights
- Fridays85% on time · p90 35 min · 252 flights
- Mondays83% on time · p90 35 min · 252 flights
- Saturdays83% on time · p90 25 min · 192 flights · limited
- Wednesdays82% on time · p90 30 min · 224 flights
- Thursdays80% on time · p90 35 min · 252 flights
- Sundays77% on time · p90 40 min · 248 flights
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