ASE to SFO flight delays & on-time performance
Nonstop flights from Aspen-Pitkin County Airport (Sardy Field) to San Francisco International Airport · 848 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ASE or SFO right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Aspen (ASE) to San Francisco (SFO) arrived on time 62% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 5.6% were cancelled, and 19% arrived an hour or more late.
- SkyWest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 7am did best (84% on time); around 10am did worst (50%).
- Wednesday was the most reliable day to fly (77% on time) and Friday the least (54%).
- The largest source of delay minutes was air traffic control & airport congestion (43%).
Which airline is most on time from ASE to SFO?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 62% | 5.6% | 38 min | 18.7% | 376 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am84%55 flights
- 9am50%108 flights
- 10am50%19 flights
- 1pm65%54 flights
- 4pm72%49 flights
- 6pm63%20 flights
- 7pm54%65 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday56%5.9% cancelled
- Tuesday73%2.2% cancelled
- Wednesday77%6.0% cancelled
- Thursday55%1.9% cancelled
- Friday54%11.7% cancelled
- Saturday64%6.5% cancelled
- Sunday56%3.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion43%
- Late-arriving aircraft24%
- Airline (crew, maintenance, cleaning, fueling)17%
- Extreme weather16%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather95%
- Air traffic control & airport congestion5%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
ASE to SFO: common questions
- How often are ASE to SFO flights on time?
- 62% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Aspen to San Francisco cancelled?
- 5.6% of scheduled flights were cancelled (21 of 376).
- How long are typical delays?
- Across all flights the average arrival delay was 38 min (early arrivals count as zero). Flights that were late arrived 98 min behind schedule on average, and 18.7% of flights were an hour or more late.
- How long is taxi time at ASE?
- Flights on this route spent 24 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SFO to ASE — 69% on time
More flights from Aspen
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ASE → SFO, nonstop flights by US airlines that report to the DOT. How we calculate this.