Historical on-time performance
St. Louis to Philadelphia
Flights on STL–PHL arrive on time 77% of the time over the last 12 months.
based on 1,308 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.
- PSA AirlinesOn-time86%Medianon timep90on timeCancel8.3%Flights36
- American AirlinesOn-time77%Medianon timep9060 minCancel1.0%Flights577
- Southwest AirlinesOn-time76%Medianon timep9040 minCancel0.3%Flights695
Why flights run late
Delay causes
- Airline39%
- Weather2%
- Air traffic (NAS)8%
- Late aircraft50%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather91%
- Air traffic (NAS)9%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 11 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 STL → PHL
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 — 88% on time.
- Mornings88% on time · p90 15 min · 2,043 flights
- Middays80% on time · p90 35 min · 754 flights
- Evenings68% on time · p90 50 min · 651 flights
- Afternoons67% on time · p90 60 min · 758 flights
- Overnights59% on time · p90 75 min · 274 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 82% on time.
- Wednesdays82% on time · p90 25 min · 631 flights
- Saturdays81% on time · p90 30 min · 507 flights
- Tuesdays80% on time · p90 35 min · 631 flights
- Thursdays78% on time · p90 40 min · 662 flights
- Mondays76% on time · p90 40 min · 688 flights
- Fridays76% on time · p90 45 min · 690 flights
- Sundays76% on time · p90 40 min · 671 flights
Keep exploring