Best Time to Fly CMH to DEN: On-Time Stats by Hour & Airline
John Glenn Columbus International → Denver International
Data through July 2026 · Last updated October 18, 2026
1,769 flights were scheduled from Columbus (CMH) to Denver (DEN) in the last 12 months, and 80.1% of those that flew arrived on time, 2.4 points above the US average of 77.6%.
United Airlines was the most punctual of the 3 airlines on the route at 82.0%, while Frontier Airlines trailed at 70.2%.
September has been the best month (89% on time) and Friday the weakest day of the week (79%).
0.6% of flights were cancelled, versus 1.8% nationally.
CMH to DEN 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 |
|---|---|---|---|---|
| United Airlines | 82.0% | 75 min | 0.8% | 728 |
| Southwest Airlines | 79.8% | 63 min | 0.4% | 919 |
| Frontier Airlines | 70.2% | 78 min | 0.8% | 122 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CMH to DEN
On-time arrival % by scheduled departure hour (local time), 3,492 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.6% | 0.7% | 270 |
| 6am–7am | 94.2% | 0.6% | 313 |
| 7am–8am | 91.5% | 0.0% | 47 |
| 8am–9am | 85.4% | 0.7% | 574 |
| 9am–10am | 88.9% | 0.4% | 237 |
| 10am–11am | 83.7% | 0.0% | 49 |
| 11am–12pm | 94.5% | 0.0% | 55 |
| 12pm–1pm | 80.0% | 0.0% | 126 |
| 1pm–2pm | 84.9% | 0.0% | 53 |
| 2pm–3pm | 77.3% | 0.0% | 101 |
| 3pm–4pm | 77.2% | 0.0% | 579 |
| 4pm–5pm | 78.4% | 1.1% | 286 |
| 5pm–6pm | 64.4% | 0.0% | 87 |
| 6pm–7pm | 61.5% | 0.3% | 310 |
| 7pm–8pm | 63.1% | 0.0% | 224 |
| 8pm–9pm | 68.3% | 0.6% | 168 |
| 9pm–10pm | Limited data | 13 | |
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 DEN
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) | 70.6% | -11.3 pts | 0.0% | 68 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.1% | -12.8 pts | 0.7% | 150 |
| Summer peak (Jun 15 - Aug 15) | 75.6% | -6.3 pts | 0.5% | 641 |
| All other days | 81.9% | — | 0.5% | 2,633 |
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).