Historical on-time performance
Pittsburgh to San Francisco
2,254 miData through May 2026Source: US DOT · BTS
Flights on PIT–SFO arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 529 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time82%Medianon timep9035 minCancel0.6%Flights529
Why flights run late
Delay causes
- Airline24%
- Weather3%
- Air traffic (NAS)53%
- Late aircraft20%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline67%
- Weather33%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 3 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 PIT → SFO
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 — 90% on time.
- Mornings90% on time · p90 10 min · 993 flights
- Evenings70% on time · p90 75 min · 687 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 85% on time.
- Tuesdays85% on time · p90 40 min · 213 flights
- Saturdays84% on time · p90 25 min · 199 flights · limited
- Wednesdays84% on time · p90 35 min · 227 flights
- Fridays83% on time · p90 35 min · 259 flights
- Mondays81% on time · p90 40 min · 261 flights
- Thursdays80% on time · p90 35 min · 263 flights
- Sundays76% on time · p90 45 min · 258 flights
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