Historical on-time performance
Aspen to Chicago
1,013 miData through May 2026Source: US DOT · BTS
Flights on ASE–ORD arrive on time 56% of the time over the last 12 months.
On-time rate56%arrived within 15 min
p90 delay125 min1 in 10 flights is worse (tail risk)
Cancelled6.3%of scheduled flights
based on 1,020 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time56%Medianon timep90125 minCancel6.3%Flights1,020
Why flights run late
Delay causes
- Airline19%
- Weather34%
- Air traffic (NAS)21%
- Late aircraft25%
- Security0%
Most delay minutes here are attributed to Weather.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather97%
- Air traffic (NAS)3%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 64 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 → ORD
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 — 69% on time.
- Mornings69% on time · p90 90 min · 885 flights
- Middays59% on time · p90 110 min · 1,591 flights
- Afternoons50% on time · p90 130 min · 430 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 52% to 73% on time.
- Wednesdays73% on time · p90 70 min · 394 flights
- Tuesdays69% on time · p90 85 min · 356 flights
- Thursdays62% on time · p90 95 min · 431 flights
- Mondays58% on time · p90 110 min · 422 flights
- Sundays56% on time · p90 120 min · 433 flights
- Fridays55% on time · p90 130 min · 436 flights
- Saturdays52% on time · p90 155 min · 435 flights
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