Historical on-time performance
Chicago to Philadelphia
668 miData through Dec 2025Source: US DOT · BTS
Flights on MDW–PHL arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 1,443 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time75%Medianon timep9040 minCancel1.0%Flights1,443
Why flights run late
Delay causes
- Airline27%
- Weather2%
- Air traffic (NAS)29%
- Late aircraft41%
- Security1%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
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 · 1,310 flights
- Middays81% on time · p90 30 min · 1,246 flights
- Evenings67% on time · p90 50 min · 860 flights
- Afternoons63% on time · p90 70 min · 1,069 flights
- Overnights53% on time · p90 85 min · 602 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 78% on time.
- Saturdays78% on time · p90 35 min · 544 flights
- Tuesdays78% on time · p90 35 min · 694 flights
- Wednesdays74% on time · p90 40 min · 715 flights
- Thursdays74% on time · p90 45 min · 766 flights
- Mondays71% on time · p90 50 min · 807 flights
- Sundays71% on time · p90 50 min · 768 flights
- Fridays70% on time · p90 55 min · 793 flights
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