Aspen (ASE) to San Francisco (SFO): On-Time Performance
Data through May 2026
The biggest risk when flying ASE to SFO isn't a late arrival — it's not departing at all. 7.1% of scheduled flights on this route were cancelled, several times the typical US rate. When flights do go, 70% land on time, below the national average of 78%.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 31 min
- completed flights
- Cancelled
- 7.1%
- Flights/day
- 1.0
- last 12 months
- Duration
- 2h 46m
- scheduled
- Distance
- 848 mi
Monthly on-time trend
Best time to fly from ASE to SFO
Aim for departures around 9 a.m. (82% on-time); avoid 10 a.m. departures (46%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 62% | 49 min |
| Tuesdaybest | 85% | 13 min |
| Wednesday | 82% | 14 min |
| Thursday | 68% | 37 min |
| Friday | 65% | 36 min |
| Saturday | 72% | 28 min |
| Sunday | 59% | 33 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 operations23%
- National airspace system33%
- Weather8%
Frequently asked questions
- How often are flights from ASE to SFO delayed?
- 30% of ASE–SFO 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 31 minutes.
- What is the best time of day to fly from ASE to SFO?
- Departures around 9 a.m. have the best record (82% on-time), while departures around 10 a.m. have the worst (46%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ASE to SFO?
- The scheduled ASE–SFO flight time averages 2h 46m over 848 miles. Actual arrival times vary — flights on this route land 15+ minutes late 30% of the time.
- How often are ASE to SFO flights cancelled?
- 7.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from ASE to SFO?
- December 2025 was the roughest month in this dataset, with only 48% of arrivals on time. The best was September 2025 at 92%. If your dates are flexible, that 44-point gap is worth planning around.
Explore related pages
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Based on 733 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.