Historical on-time performance
San Francisco to Aspen
848 miData through May 2026Source: US DOT · BTS
Flights on SFO–ASE arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay95 min1 in 10 flights is worse (tail risk)
Cancelled3.0%of scheduled flights
based on 304 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time69%Medianon timep9095 minCancel3.0%Flights304
Why flights run late
Delay causes
- Airline46%
- Weather9%
- Air traffic (NAS)17%
- Late aircraft28%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline11%
- Weather78%
- Air traffic (NAS)11%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 9 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SFO → ASE
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 55% to 69% on time.
- Evenings69% on time · p90 25 min · 111 flights · limited
- Afternoons69% on time · p90 75 min · 541 flights
- Mornings55% on time · p90 125 min · 401 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 56% to 75% on time.
- Wednesdays75% on time · p90 55 min · 140 flights · limited
- Tuesdays70% on time · p90 90 min · 135 flights · limited
- Saturdays64% on time · p90 110 min · 169 flights · limited
- Thursdays63% on time · p90 80 min · 156 flights · limited
- Mondays62% on time · p90 80 min · 151 flights · limited
- Sundays61% on time · p90 100 min · 164 flights · limited
- Fridays56% on time · p90 120 min · 160 flights · limited
Keep exploring