Best Time to Fly CMH to ORD: On-Time Stats by Hour & Airline
John Glenn Columbus International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.1% of Columbus (CMH) to Chicago (ORD) flights arrived on time (4,930 scheduled flights). That is 1.5 points below the national average of 77.6%.
American Airlines was the most punctual of the 6 airlines on the route at 85.6%, while United Airlines trailed at 67.9%.
May has been the best month (82% on time) and Monday the weakest day of the week (74%).
2.7% of flights were cancelled, versus 1.8% nationally.
CMH 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 |
|---|---|---|---|---|
| American Airlines | 85.6% | 95 min | 2.3% | 128 |
| Republic Airways | 83.9% | 67 min | 2.5% | 1,577 |
| Envoy Air | 76.4% | 102 min | 2.3% | 1,405 |
| PSA Airlines | 69.8% | 75 min | 1.9% | 54 |
| SkyWest Airlines | 69.2% | 114 min | 5.7% | 547 |
| United Airlines | 67.9% | 86 min | 2.3% | 1,219 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CMH to ORD
On-time arrival % by scheduled departure hour (local time), 9,107 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.7% | 1.4% | 491 |
| 6am–7am | 88.4% | 0.5% | 855 |
| 7am–8am | 74.9% | 1.2% | 1,057 |
| 8am–9am | 78.9% | 0.4% | 776 |
| 9am–10am | 84.6% | 1.5% | 653 |
| 10am–11am | 85.0% | 0.8% | 783 |
| 11am–12pm | 86.2% | 0.7% | 592 |
| 12pm–1pm | 80.2% | 1.8% | 113 |
| 1pm–2pm | 78.9% | 1.9% | 261 |
| 2pm–3pm | 74.4% | 1.8% | 1,022 |
| 3pm–4pm | 76.8% | 5.5% | 201 |
| 4pm–5pm | 77.8% | 2.2% | 686 |
| 5pm–6pm | 54.5% | 2.0% | 642 |
| 6pm–7pm | 48.2% | 1.7% | 417 |
| 7pm–8pm | 65.0% | 7.2% | 277 |
| 8pm–9pm | 52.6% | 7.4% | 231 |
| 9pm–10pm | 72.5% | 7.0% | 43 |
| 10pm–11pm | Limited data | 7 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CMH 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) | 64.3% | -13.5 pts | 7.8% | 167 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.2% | -5.6 pts | 0.0% | 270 |
| Summer peak (Jun 15 - Aug 15) | 74.8% | -3.0 pts | 2.5% | 1,668 |
| All other days | 77.8% | — | 1.5% | 7,002 |
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).