Houston (IAH) to Aspen (ASE): On-Time Performance
Data through July 2026
The biggest risk when flying IAH to ASE isn't a late arrival — it's not departing at all. 4.5% of scheduled flights on this route were cancelled, several times the typical US rate. When flights do go, 68% land on time, below the national average of 78%.
- On-time
- 68%
- arrived <15 min late
- Avg delay
- 29 min
- completed flights
- Cancelled
- 4.5%
- Flights/day
- 1.7
- last 12 months
- Duration
- 3h 7m
- scheduled
- Distance
- 913 mi
Monthly on-time trend
Best time to fly from IAH to ASE
Aim for departures around 7 a.m. (88% on-time); avoid 12 p.m. departures (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 67% | 18 min |
| Tuesday | 77% | 15 min |
| Wednesdaybest | 79% | 15 min |
| Thursday | 73% | 30 min |
| Friday | 65% | 36 min |
| Saturday | 63% | 38 min |
| Sunday | 54% | 49 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft27%
- Airline operations42%
- National airspace system22%
- Weather8%
Frequently asked questions
- How often are flights from IAH to ASE delayed?
- 32% of IAH–ASE flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 29 minutes.
- What is the best time of day to fly from IAH to ASE?
- Departures around 7 a.m. have the best record (88% on-time), while departures around 12 p.m. have the worst (60%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to ASE?
- The scheduled IAH–ASE flight time averages 3h 7m over 913 miles. Actual arrival times vary — flights on this route land 15+ minutes late 32% of the time.
- How often are IAH to ASE flights cancelled?
- 4.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from IAH to ASE?
- June 2025 was the roughest month in this dataset, with only 42% of arrivals on time. The best was October 2024 at 94%. If your dates are flexible, that 51-point gap is worth planning around.
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Based on 1,279 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.