Best Time to Fly ORD to ASE: On-Time Stats by Hour & Airline
Chicago O'Hare International → Aspen Pitkin County Sardy Field
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 60.8% of Chicago (ORD) to Aspen (ASE) flights arrived on time (1,134 scheduled flights). That is 16.8 points below the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (82% on time) and Friday the weakest day of the week (50%).
3.0% of flights were cancelled, versus 1.8% nationally.
ORD to ASE 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 | 60.8% | 97 min | 3.0% | 1,134 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to ASE
On-time arrival % by scheduled departure hour (local time), 2,064 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 69.2% | 2.7% | 111 |
| 8am–9am | 53.5% | 0.5% | 184 |
| 9am–10am | 66.7% | 0.5% | 559 |
| 10am–11am | 44.6% | 2.8% | 177 |
| 11am–12pm | 46.0% | 0.0% | 108 |
| 12pm–1pm | 50.7% | 6.2% | 162 |
| 1pm–2pm | 48.8% | 3.6% | 138 |
| 3pm–4pm | 65.4% | 5.6% | 178 |
| 4pm–5pm | 54.5% | 4.2% | 71 |
| 7pm–8pm | 69.0% | 3.8% | 369 |
| 8pm–9pm | Limited data | 7 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to ASE
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) | Limited data | 1 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 31.5% | -31.8 pts | 1.9% | 155 |
| Summer peak (Jun 15 - Aug 15) | 59.7% | -3.6 pts | 3.0% | 334 |
| All other days | 63.3% | — | 2.7% | 1,574 |
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).