Historical on-time performance
Philadelphia to Chicago
Flights on PHL–ORD arrive on time 70% of the time over the last 12 months.
based on 4,605 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-time72%Medianon timep9055 minCancel1.7%Flights1,715
- American AirlinesOn-time69%Medianon timep9080 minCancel3.9%Flights2,890
Why flights run late
Delay causes
- Airline24%
- Weather4%
- Air traffic (NAS)34%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline15%
- Weather75%
- Air traffic (NAS)10%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 142 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 PHL → ORD
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 — 84% on time.
- Mornings84% on time · p90 20 min · 4,118 flights
- Middays82% on time · p90 40 min · 4,329 flights
- Afternoons68% on time · p90 85 min · 1,734 flights
- Overnights65% on time · p90 90 min · 675 flights
- Evenings61% on time · p90 85 min · 2,710 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 81% on time.
- Tuesdays81% on time · p90 45 min · 1,908 flights
- Wednesdays80% on time · p90 40 min · 1,909 flights
- Saturdays77% on time · p90 40 min · 1,663 flights
- Thursdays76% on time · p90 50 min · 2,005 flights
- Mondays74% on time · p90 65 min · 2,033 flights
- Fridays73% on time · p90 70 min · 2,046 flights
- Sundays72% on time · p90 70 min · 2,002 flights
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