Historical on-time performance
Columbia to Chicago
315 miData through May 2026Source: US DOT · BTS
Flights on COU–ORD arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled3.5%of scheduled flights
based on 1,801 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirbestOn-time73%Medianon timep9060 minCancel2.6%Flights1,118
- SkyWest AirlinesOn-time63%Medianon timep90100 minCancel5.0%Flights683
Why flights run late
Delay causes
- Airline25%
- Weather9%
- Air traffic (NAS)22%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline2%
- Weather70%
- Air traffic (NAS)29%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 63 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 COU → 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 — 80% on time.
- Mornings80% on time · p90 40 min · 1,312 flights
- Middays72% on time · p90 70 min · 585 flights
- Afternoons69% on time · p90 65 min · 614 flights
- Evenings49% on time · p90 95 min · 376 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 76% on time.
- Saturdays76% on time · p90 40 min · 392 flights
- Wednesdays74% on time · p90 50 min · 404 flights
- Mondays74% on time · p90 60 min · 431 flights
- Thursdays73% on time · p90 60 min · 423 flights
- Tuesdays71% on time · p90 90 min · 402 flights
- Fridays71% on time · p90 65 min · 431 flights
- Sundays67% on time · p90 90 min · 431 flights
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