Historical on-time performance
Chicago to Philadelphia
668 miData through May 2026Source: US DOT · BTS
Flights on MDW–PHL arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights
based on 1,445 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time73%Medianon timep9040 minCancel1.2%Flights1,445
Why flights run late
Delay causes
- Airline30%
- Weather2%
- Air traffic (NAS)28%
- Late aircraft39%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline6%
- Weather67%
- Air traffic (NAS)28%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 18 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 MDW → 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 — 89% on time.
- Mornings89% on time · p90 10 min · 1,288 flights
- Middays80% on time · p90 30 min · 1,240 flights
- Evenings66% on time · p90 50 min · 908 flights
- Afternoons62% on time · p90 65 min · 1,058 flights
- Overnights51% on time · p90 90 min · 455 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 80% on time.
- Saturdays80% on time · p90 35 min · 542 flights
- Tuesdays77% on time · p90 35 min · 668 flights
- Wednesdays75% on time · p90 40 min · 687 flights
- Thursdays73% on time · p90 45 min · 747 flights
- Fridays72% on time · p90 55 min · 773 flights
- Sundays70% on time · p90 50 min · 756 flights
- Mondays69% on time · p90 50 min · 776 flights
Keep exploring