Columbus (CMH) to Denver (DEN): On-Time Performance
Data through May 2026
Columbus (CMH) to Denver (DEN) effectively runs on two schedules. In September 2024, 92% of arrivals were on time; in December 2025 that fell to 63% — a 29-point seasonal swing. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 63%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 4.8
- last 12 months
- Duration
- 3h 15m
- scheduled
- Distance
- 1,154 mi
Best airline from CMH to DEN
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 82% | 13 min | 0.5% | 1,458 |
| Southwest Airlines | 78% | 14 min | 0.3% | 1,845 |
| Frontier Airlines | 69% | 23 min | 1.6% | 190 |
Monthly on-time trend
Best time to fly from CMH to DEN
Aim for departures around 7 a.m. (94% on-time); avoid 7 p.m. departures (58%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 13 min |
| Tuesday | 79% | 16 min |
| Wednesdaybest | 82% | 9 min |
| Thursday | 78% | 16 min |
| Friday | 77% | 16 min |
| Saturday | 79% | 13 min |
| Sunday | 78% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft37%
- Airline operations30%
- National airspace system31%
- Weather3%
Frequently asked questions
- How often are flights from CMH to DEN delayed?
- 21% of CMH–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from CMH to DEN?
- United Airlines has the best on-time record on this route at 82%, based on 1,458 flights. 3 airlines flew CMH–DEN frequently enough to compare in this period.
- What is the best time of day to fly from CMH to DEN?
- Departures around 7 a.m. have the best record (94% on-time), while departures around 7 p.m. have the worst (58%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CMH to DEN?
- The scheduled CMH–DEN flight time averages 3h 15m over 1,154 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are CMH to DEN flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from CMH to DEN?
- December 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was September 2024 at 92%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 3,493 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.