San Francisco (SFO) to Aspen (ASE): On-Time Performance
Data through July 2026
San Francisco (SFO) to Aspen (ASE) has an unusually high scrub rate — 3% of scheduled departures never left the gate, a cancellation rate several times the national figure. When flights do go, 66% land on time, below the national average of 78%.
- On-time
- 66%
- arrived <15 min late
- Avg delay
- 38 min
- completed flights
- Cancelled
- 3.0%
- Flights/day
- 1.0
- last 12 months
- Duration
- 2h 33m
- scheduled
- Distance
- 848 mi
Monthly on-time trend
Best time to fly from SFO to ASE
Aim for departures around 6 p.m. (77% on-time); avoid 8 a.m. departures (51%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 64% | 32 min |
| Tuesday | 74% | 48 min |
| Wednesdaybest | 76% | 29 min |
| Thursday | 60% | 33 min |
| Friday | 54% | 42 min |
| Saturday | 68% | 39 min |
| Sunday | 66% | 43 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 operations38%
- National airspace system23%
- Weather12%
Frequently asked questions
- How often are flights from SFO to ASE delayed?
- 34% of SFO–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 38 minutes.
- What is the best time of day to fly from SFO to ASE?
- Departures around 6 p.m. have the best record (77% on-time), while departures around 8 a.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SFO to ASE?
- The scheduled SFO–ASE flight time averages 2h 33m over 848 miles. Actual arrival times vary — flights on this route land 15+ minutes late 34% of the time.
- How often are SFO to ASE flights cancelled?
- 3% 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 SFO to ASE?
- December 2024 was the roughest month in this dataset, with only 38% of arrivals on time. The best was September 2025 at 88%. If your dates are flexible, that 50-point gap is worth planning around.
Explore related pages
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Related guides
Based on 777 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.