Historical on-time performance
San Francisco to Philadelphia
Flights on SFO–PHL arrive on time 84% of the time over the last 12 months.
based on 1,912 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-time86%Medianon timep9020 minCancel0.6%Flights684
- American AirlinesOn-time83%Medianon timep9025 minCancel1.9%Flights1,228
Why flights run late
Delay causes
- Airline36%
- Weather0%
- Air traffic (NAS)15%
- Late aircraft49%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline4%
- Weather96%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 27 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 → PHL
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 78% to 84% on time.
- Mornings84% on time · p90 20 min · 2,136 flights
- Overnights84% on time · p90 20 min · 1,706 flights
- Early mornings78% on time · p90 25 min · 114 flights · limited
- Middays78% on time · p90 35 min · 782 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 85% on time.
- Wednesdays85% on time · p90 20 min · 662 flights
- Tuesdays84% on time · p90 20 min · 641 flights
- Fridays84% on time · p90 25 min · 724 flights
- Mondays83% on time · p90 20 min · 717 flights
- Saturdays83% on time · p90 20 min · 643 flights
- Thursdays81% on time · p90 20 min · 718 flights
- Sundays80% on time · p90 30 min · 724 flights
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