Historical on-time performance
Chicago to Aspen
1,013 miData through May 2026Source: US DOT · BTS
Flights on ORD–ASE arrive on time 55% of the time over the last 12 months.
On-time rate55%arrived within 15 min
p90 delay115 min1 in 10 flights is worse (tail risk)
Cancelled2.6%of scheduled flights
based on 1,021 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time55%Medianon timep90115 minCancel2.6%Flights1,021
Why flights run late
Delay causes
- Airline31%
- Weather18%
- Air traffic (NAS)31%
- Late aircraft20%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 27 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 ORD → 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 47% to 65% on time.
- Evenings65% on time · p90 50 min · 484 flights
- Mornings64% on time · p90 80 min · 1,110 flights
- Afternoons59% on time · p90 100 min · 364 flights
- Middays47% on time · p90 120 min · 911 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 48% to 66% on time.
- Wednesdays66% on time · p90 80 min · 395 flights
- Mondays64% on time · p90 75 min · 420 flights
- Tuesdays64% on time · p90 75 min · 356 flights
- Thursdays59% on time · p90 75 min · 434 flights
- Sundays57% on time · p90 95 min · 431 flights
- Saturdays51% on time · p90 125 min · 436 flights
- Fridays48% on time · p90 90 min · 436 flights
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