Aspen (ASE) to San Francisco (SFO): On-Time Performance
Data through July 2026
The biggest risk when flying ASE to SFO isn't a late arrival — it's not departing at all. 6.5% of scheduled flights on this route were cancelled, several times the typical US rate. When flights do go, 65% land on time, below the national average of 78%.
- On-time
- 65%
- arrived <15 min late
- Avg delay
- 34 min
- completed flights
- Cancelled
- 6.5%
- 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 12 p.m. (79% on-time); avoid 10 a.m. departures (46%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 60% | 49 min |
| Tuesdaybest | 79% | 15 min |
| Wednesday | 77% | 16 min |
| Thursday | 62% | 37 min |
| Friday | 59% | 39 min |
| Saturday | 69% | 41 min |
| Sunday | 57% | 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 aircraft32%
- Airline operations19%
- National airspace system36%
- Weather13%
Frequently asked questions
- How often are flights from ASE to SFO delayed?
- 35% of ASE–SFO 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 34 minutes.
- What is the best time of day to fly from ASE to SFO?
- Departures around 12 p.m. have the best record (79% 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 35% of the time.
- How often are ASE to SFO flights cancelled?
- 6.5% 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 ASE to SFO?
- June 2026 was the roughest month in this dataset, with only 20% of arrivals on time. The best was September 2025 at 92%. If your dates are flexible, that 72-point gap is worth planning around.
Explore related pages
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Related guides
Based on 773 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.