Best Time to Fly DEN to COS: On-Time Stats by Hour & Airline
Denver International → City of Colorado Springs Municipal
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.5% of Denver (DEN) to Colorado Springs (COS) flights arrived on time (5,008 scheduled flights). That is 1.1 points below the national average of 77.6%.
United Airlines was the most punctual of the 3 airlines on the route at 79.2%, while Southwest Airlines trailed at 74.4%.
October has been the best month (85% on time) and Sunday the weakest day of the week (73%).
1.2% of flights were cancelled, versus 1.8% nationally.
DEN to COS 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 | 79.2% | 69 min | 0.5% | 579 |
| SkyWest Airlines | 76.8% | 70 min | 1.6% | 3,300 |
| Southwest Airlines | 74.4% | 54 min | 0.3% | 1,129 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to COS
On-time arrival % by scheduled departure hour (local time), 10,243 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 85.4% | 0.4% | 496 |
| 8am–9am | 84.5% | 0.5% | 377 |
| 9am–10am | 84.7% | 1.4% | 914 |
| 10am–11am | 84.4% | 0.0% | 302 |
| 11am–12pm | 80.9% | 1.1% | 790 |
| 12pm–1pm | 84.9% | 0.7% | 286 |
| 1pm–2pm | 80.0% | 1.0% | 770 |
| 2pm–3pm | 79.0% | 0.0% | 191 |
| 3pm–4pm | 78.2% | 1.3% | 977 |
| 4pm–5pm | 67.2% | 3.2% | 625 |
| 5pm–6pm | 67.0% | 1.8% | 660 |
| 6pm–7pm | 67.0% | 0.4% | 463 |
| 7pm–8pm | 65.3% | 1.1% | 1,054 |
| 8pm–9pm | 68.1% | 0.8% | 726 |
| 9pm–10pm | 67.6% | 1.5% | 907 |
| 10pm–11pm | 73.2% | 1.4% | 295 |
| 11pm–12am | 83.0% | 0.7% | 410 |
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 COS
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) | 78.5% | +0.6 pts | 0.0% | 186 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.1% | +0.2 pts | 0.0% | 447 |
| Summer peak (Jun 15 - Aug 15) | 63.0% | -14.9 pts | 1.7% | 1,811 |
| All other days | 77.9% | — | 1.2% | 7,799 |
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).