Best Time to Fly ASE to DEN: On-Time Stats by Hour & Airline
Aspen Pitkin County Sardy Field → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.3% of Aspen (ASE) to Denver (DEN) flights arrived on time (2,725 scheduled flights). That is 1.4 points below the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
May has been the best month (85% on time) and Sunday the weakest day of the week (70%).
5.0% of flights were cancelled, versus 1.8% nationally.
ASE 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 |
|---|---|---|---|---|
| SkyWest Airlines | 76.3% | 104 min | 5.0% | 2,725 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ASE to DEN
On-time arrival % by scheduled departure hour (local time), 5,582 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 82.3% | 3.7% | 804 |
| 8am–9am | 79.0% | 2.0% | 296 |
| 9am–10am | 74.8% | 3.2% | 562 |
| 10am–11am | 84.8% | 5.5% | 272 |
| 11am–12pm | 74.5% | 3.0% | 624 |
| 12pm–1pm | 70.4% | 6.0% | 248 |
| 1pm–2pm | 74.8% | 4.0% | 652 |
| 2pm–3pm | 71.0% | 5.0% | 500 |
| 3pm–4pm | 58.6% | 6.7% | 686 |
| 4pm–5pm | 61.7% | 16.5% | 97 |
| 5pm–6pm | 73.4% | 6.8% | 310 |
| 6pm–7pm | 69.4% | 8.5% | 529 |
| 7pm–8pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ASE 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) | 71.6% | -5.1 pts | 12.0% | 92 |
| Christmas & New Year (Dec 20 - Jan 3) | 61.3% | -15.4 pts | 7.0% | 300 |
| Summer peak (Jun 15 - Aug 15) | 62.6% | -14.1 pts | 4.9% | 992 |
| All other days | 76.7% | — | 4.8% | 4,198 |
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).