Historical on-time performance
Aspen to San Francisco
848 miData through May 2026Source: US DOT · BTS
Flights on ASE–SFO arrive on time 66% of the time over the last 12 months.
On-time rate66%arrived within 15 min
p90 delay115 min1 in 10 flights is worse (tail risk)
Cancelled6.6%of scheduled flights
based on 302 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time66%Medianon timep90115 minCancel6.6%Flights302
Why flights run late
Delay causes
- Airline27%
- Weather6%
- Air traffic (NAS)35%
- Late aircraft33%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline0%
- Weather95%
- Air traffic (NAS)5%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 20 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 ASE → SFO
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 70% on time.
- Mornings70% on time · p90 70 min · 392 flights
- Middays59% on time · p90 145 min · 266 flights
- Afternoons57% on time · p90 80 min · 137 flights · limited
- Evenings53% on time · p90 115 min · 275 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 51% to 75% on time.
- Wednesdays75% on time · p90 60 min · 138 flights · limited
- Tuesdays72% on time · p90 45 min · 138 flights · limited
- Thursdays63% on time · p90 100 min · 152 flights · limited
- Saturdays60% on time · p90 95 min · 169 flights · limited
- Mondays57% on time · p90 125 min · 151 flights · limited
- Sundays55% on time · p90 95 min · 165 flights · limited
- Fridays51% on time · p90 125 min · 157 flights · limited
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