Historical on-time performance
Philadelphia to San Francisco
Flights on PHL–SFO arrive on time 74% of the time over the last 12 months.
based on 1,915 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-time74%Medianon timep9045 minCancel0.6%Flights685
- American AirlinesOn-time73%Medianon timep9055 minCancel1.7%Flights1,230
Why flights run late
Delay causes
- Airline24%
- Weather11%
- Air traffic (NAS)38%
- Late aircraft26%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline8%
- Weather92%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 25 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 PHL → 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 — 86% on time.
- Mornings86% on time · p90 15 min · 2,127 flights
- Afternoons69% on time · p90 70 min · 750 flights
- Overnights67% on time · p90 50 min · 126 flights · limited
- Evenings65% on time · p90 70 min · 1,802 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 79% on time.
- Wednesdays79% on time · p90 45 min · 662 flights
- Tuesdays78% on time · p90 35 min · 645 flights
- Saturdays76% on time · p90 45 min · 643 flights
- Sundays74% on time · p90 50 min · 722 flights
- Mondays73% on time · p90 50 min · 720 flights
- Thursdays73% on time · p90 50 min · 716 flights
- Fridays73% on time · p90 50 min · 726 flights
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