Champaign/Urbana (CMI) to Chicago (ORD): On-Time Performance
Data through July 2026
Champaign/Urbana (CMI) to Chicago (ORD) effectively runs on two schedules. In October 2024, 91% of arrivals were on time; in December 2025 that fell to 66% — a 25-point seasonal swing. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 62%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 2.6%
- Flights/day
- 2.9
- last 12 months
- Duration
- 1h 12m
- scheduled
- Distance
- 135 mi
Monthly on-time trend
Best time to fly from CMI to ORD
Aim for departures around 7 a.m. (87% on-time); avoid 7 p.m. departures (51%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 24 min |
| Tuesday | 77% | 17 min |
| Wednesday | 78% | 16 min |
| Thursday | 78% | 20 min |
| Friday | 78% | 15 min |
| Saturdaybest | 82% | 17 min |
| Sunday | 72% | 29 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft48%
- Airline operations22%
- National airspace system26%
- Weather4%
Frequently asked questions
- How often are flights from CMI to ORD delayed?
- 23% of CMI–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 20 minutes.
- What is the best time of day to fly from CMI to ORD?
- Departures around 7 a.m. have the best record (87% on-time), while departures around 7 p.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CMI to ORD?
- The scheduled CMI–ORD flight time averages 1h 12m over 135 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are CMI to ORD flights cancelled?
- 2.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from CMI to ORD?
- December 2025 was the roughest month in this dataset, with only 66% of arrivals on time. The best was October 2024 at 91%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 1,837 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.