Historical on-time performance
Philadelphia to Chicago
668 miData through Dec 2025Source: US DOT · BTS
Flights on PHL–MDW arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 1,444 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time72%Medianon timep9055 minCancel1.0%Flights1,444
Why flights run late
Delay causes
- Airline24%
- Weather3%
- Air traffic (NAS)25%
- Late aircraft48%
- Security0%
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 PHL → MDW
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 — 87% on time.
- Mornings87% on time · p90 15 min · 1,370 flights
- Middays81% on time · p90 30 min · 1,384 flights
- Afternoons76% on time · p90 50 min · 779 flights
- Overnights59% on time · p90 95 min · 562 flights
- Evenings57% on time · p90 80 min · 1,000 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 79% on time.
- Tuesdays79% on time · p90 30 min · 698 flights
- Wednesdays77% on time · p90 35 min · 715 flights
- Saturdays76% on time · p90 40 min · 544 flights
- Mondays75% on time · p90 55 min · 809 flights
- Thursdays74% on time · p90 50 min · 769 flights
- Fridays72% on time · p90 60 min · 795 flights
- Sundays72% on time · p90 60 min · 765 flights
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