Best Time to Fly DEN to CMH: On-Time Stats by Hour & Airline
Denver International → John Glenn Columbus International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.9% of Denver (DEN) to Columbus (CMH) flights arrived on time (1,769 scheduled flights). That is 3.7 points below the national average of 77.6%.
United Airlines was the most punctual of the 3 airlines on the route at 83.4%, while Southwest Airlines trailed at 65.2%.
October has been the best month (85% on time) and Wednesday the weakest day of the week (69%).
0.7% of flights were cancelled, versus 1.8% nationally.
DEN to CMH 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 | 83.4% | 60 min | 0.7% | 728 |
| Frontier Airlines | 82.6% | 98 min | 0.8% | 122 |
| Southwest Airlines | 65.2% | 53 min | 0.8% | 919 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to CMH
On-time arrival % by scheduled departure hour (local time), 3,490 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 3 | |
| 7am–8am | 84.0% | 0.0% | 50 |
| 8am–9am | 90.8% | 0.0% | 141 |
| 9am–10am | 88.0% | 0.4% | 769 |
| 10am–11am | 77.4% | 0.3% | 372 |
| 11am–12pm | 77.4% | 0.0% | 159 |
| 12pm–1pm | 81.8% | 0.0% | 33 |
| 1pm–2pm | 81.8% | 1.5% | 67 |
| 2pm–3pm | 70.2% | 0.8% | 254 |
| 3pm–4pm | 61.4% | 0.8% | 133 |
| 4pm–5pm | 63.2% | 1.5% | 135 |
| 5pm–6pm | 68.5% | 0.4% | 816 |
| 6pm–7pm | 61.5% | 0.9% | 230 |
| 7pm–8pm | 49.8% | 0.4% | 269 |
| 8pm–9pm | 70.7% | 1.7% | 59 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to CMH
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) | 82.3% | +6.7 pts | 0.0% | 68 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.7% | +3.0 pts | 0.0% | 150 |
| Summer peak (Jun 15 - Aug 15) | 62.3% | -13.4 pts | 0.6% | 640 |
| All other days | 75.7% | — | 0.5% | 2,632 |
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).