SFO to ASE flight delays & on-time performance
Nonstop flights from San Francisco International Airport to Aspen-Pitkin County Airport (Sardy Field) · 848 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SFO or ASE right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Francisco (SFO) to Aspen (ASE) arrived on time 69% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.4% were cancelled, and 15% arrived an hour or more late.
- SkyWest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 6pm did best (88% on time); around 8am did worst (58%).
- Wednesday was the most reliable day to fly (85% on time) and Friday the least (59%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (31%).
Which airline is most on time from SFO to ASE?
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. | 69% | 2.4% | 42 min | 15.4% | 378 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am76%27 flights
- 8am58%33 flights
- 9am70%77 flights
- 12pm80%15 flights
- 4pm64%168 flights
- 6pm88%51 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday63%2.0% cancelled
- Tuesday84%2.2% cancelled
- Wednesday85%2.0% cancelled
- Thursday61%0.0% cancelled
- Friday59%3.6% cancelled
- Saturday71%3.2% cancelled
- Sunday63%3.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion30%
- Late-arriving aircraft26%
- Extreme weather13%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather78%
- Airline (crew, maintenance, cleaning, fueling)11%
- Air traffic control & airport congestion11%
- Security0%
SFO to ASE: common questions
- How often are SFO to ASE flights on time?
- 69% 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 San Francisco to Aspen cancelled?
- 2.4% of scheduled flights were cancelled (9 of 378).
- How long are typical delays?
- Across all flights the average arrival delay was 42 min (early arrivals count as zero). Flights that were late arrived 131 min behind schedule on average, and 15.4% of flights were an hour or more late.
- How long is taxi time at SFO?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ASE to SFO — 62% on time
More flights from San Francisco
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SFO → ASE, nonstop flights by US airlines that report to the DOT. How we calculate this.