Historical on-time performance
Denver to Chicago
Flights on DEN–ORD arrive on time 70% of the time over the last 12 months.
based on 5,977 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.
- Envoy AirOn-time75%Medianon timep9050 minCancel0.0%Flights108
- Frontier AirlinesOn-time73%Medianon timep9075 minCancel1.1%Flights189
- United AirlinesOn-time70%Medianon timep9060 minCancel0.7%Flights3,701
- American AirlinesOn-time70%Medianon timep9085 minCancel1.8%Flights1,469
- Southwest AirlinesOn-time59%Median5 minp9070 minCancel0.4%Flights510
Why flights run late
Delay causes
- Airline26%
- Weather5%
- Air traffic (NAS)30%
- Late aircraft39%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline28%
- Weather69%
- Air traffic (NAS)3%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 58 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 DEN → 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 — 85% on time.
- Mornings85% on time · p90 20 min · 5,747 flights
- Middays75% on time · p90 45 min · 4,938 flights
- Overnights69% on time · p90 80 min · 1,543 flights
- Afternoons64% on time · p90 65 min · 3,372 flights
- Evenings62% on time · p90 95 min · 3,333 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 76% on time.
- Wednesdays76% on time · p90 50 min · 2,649 flights
- Tuesdays75% on time · p90 55 min · 2,616 flights
- Saturdays75% on time · p90 50 min · 2,459 flights
- Mondays74% on time · p90 55 min · 2,781 flights
- Fridays72% on time · p90 60 min · 2,829 flights
- Thursdays72% on time · p90 50 min · 2,794 flights
- Sundays70% on time · p90 60 min · 2,805 flights
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