Historical on-time performance
Champaign to Chicago
135 miData through May 2026Source: US DOT · BTS
Flights on CMI–ORD arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled3.5%of scheduled flights
based on 1,024 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time72%Medianon timep9070 minCancel3.5%Flights1,024
Why flights run late
Delay causes
- Airline13%
- Weather2%
- Air traffic (NAS)31%
- Late aircraft54%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline3%
- Weather64%
- Air traffic (NAS)33%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 36 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 CMI → 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 30 min · 1,051 flights
- Middays78% on time · p90 55 min · 550 flights
- Afternoons73% on time · p90 55 min · 517 flights
- Evenings58% on time · p90 75 min · 233 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 81% on time.
- Saturdays81% on time · p90 40 min · 341 flights
- Tuesdays80% on time · p90 45 min · 262 flights
- Wednesdays79% on time · p90 50 min · 343 flights
- Mondays77% on time · p90 60 min · 359 flights
- Thursdays76% on time · p90 50 min · 364 flights
- Fridays76% on time · p90 50 min · 362 flights
- Sundays72% on time · p90 85 min · 368 flights
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