Best Time to Fly COU to ORD: On-Time Stats by Hour & Airline
Columbia Regional → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.7% of Columbia (COU) to Chicago (ORD) flights arrived on time (1,976 scheduled flights). That is 3.9 points below the national average of 77.6%.
Envoy Air was the most punctual of the 2 airlines on the route at 77.1%, while SkyWest Airlines trailed at 69.1%.
May has been the best month (84% on time) and Sunday the weakest day of the week (70%).
3.7% of flights were cancelled, versus 1.8% nationally.
COU to ORD on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Air | 77.1% | 80 min | 2.9% | 1,136 |
| SkyWest Airlines | 69.1% | 113 min | 4.8% | 840 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly COU to ORD
On-time arrival % by scheduled departure hour (local time), 2,711 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 85.9% | 3.9% | 207 |
| 6am–7am | 85.9% | 1.0% | 510 |
| 7am–8am | Limited data | 23 | |
| 8am–9am | 74.9% | 3.2% | 309 |
| 9am–10am | Limited data | 6 | |
| 10am–11am | 79.5% | 0.5% | 222 |
| 11am–12pm | 71.5% | 2.4% | 341 |
| 12pm–1pm | Limited data | 13 | |
| 1pm–2pm | 92.1% | 0.0% | 63 |
| 2pm–3pm | 69.5% | 4.7% | 86 |
| 3pm–4pm | 66.8% | 4.9% | 307 |
| 4pm–5pm | 79.4% | 2.8% | 216 |
| 5pm–6pm | 60.0% | 9.1% | 44 |
| 6pm–7pm | 63.3% | 7.8% | 204 |
| 7pm–8pm | 50.4% | 6.0% | 133 |
| 8pm–9pm | Limited data | 27 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on COU to ORD
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 63.9% | -11.5 pts | 19.6% | 46 |
| Christmas & New Year (Dec 20 - Jan 3) | 63.7% | -11.6 pts | 0.9% | 114 |
| Summer peak (Jun 15 - Aug 15) | 76.7% | +1.3 pts | 2.0% | 439 |
| All other days | 75.3% | — | 3.4% | 2,112 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).