Historical on-time performance
San Francisco to Pittsburgh
2,254 miData through May 2026Source: US DOT · BTS
Flights on SFO–PIT arrive on time 88% of the time over the last 12 months.
On-time rate88%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.2%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-time88%Medianon timep9015 minCancel0.2%Flights529
Why flights run late
Delay causes
- Airline29%
- Weather0%
- Air traffic (NAS)26%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 1 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 SFO → PIT
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 · 563 flights
- Middays86% on time · p90 25 min · 387 flights
- Overnights80% on time · p90 25 min · 720 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 90% on time.
- Tuesdays90% on time · p90 10 min · 213 flights
- Wednesdays89% on time · p90 15 min · 228 flights
- Fridays86% on time · p90 15 min · 259 flights
- Saturdays86% on time · p90 15 min · 194 flights · limited
- Mondays84% on time · p90 20 min · 261 flights
- Thursdays82% on time · p90 20 min · 261 flights
- Sundays81% on time · p90 25 min · 261 flights
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