Historical on-time performance
Colorado Springs to Chicago
917 miData through Dec 2025Source: US DOT · BTS
Flights on COS–MDW arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 196 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time77%Medianon timep9025 minCancel0.0%Flights196
Why flights run late
Delay causes
- Airline25%
- Weather1%
- Air traffic (NAS)7%
- Late aircraft67%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly COS → MDW
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 75% to 87% on time.
- Mornings87% on time · p90 15 min · 208 flights
- Middays84% on time · p90 20 min · 381 flights
- Afternoons75% on time · p90 30 min · 598 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 88% on time.
- Saturdays88% on time · p90 10 min · 129 flights · limited
- Sundays84% on time · p90 25 min · 162 flights · limited
- Tuesdays80% on time · p90 25 min · 178 flights · limited
- Wednesdays80% on time · p90 25 min · 176 flights · limited
- Fridays79% on time · p90 30 min · 183 flights · limited
- Thursdays78% on time · p90 30 min · 178 flights · limited
- Mondays75% on time · p90 30 min · 181 flights · limited
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