Historical on-time performance
Chicago to Denver
895 miData through May 2026Source: US DOT · BTS
Flights on MDW–DEN arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights
based on 2,279 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time72%Medianon timep9055 minCancel1.2%Flights2,279
Why flights run late
Delay causes
- Airline27%
- Weather5%
- Air traffic (NAS)31%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline11%
- Weather70%
- Air traffic (NAS)19%
- 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 MDW → DEN
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 — 87% on time.
- Mornings87% on time · p90 15 min · 3,016 flights
- Middays84% on time · p90 25 min · 1,819 flights
- Afternoons65% on time · p90 75 min · 1,393 flights
- Overnights64% on time · p90 65 min · 1,407 flights
- Evenings62% on time · p90 70 min · 1,318 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 80% on time.
- Wednesdays80% on time · p90 35 min · 1,220 flights
- Saturdays78% on time · p90 35 min · 980 flights
- Tuesdays78% on time · p90 40 min · 1,235 flights
- Mondays75% on time · p90 45 min · 1,401 flights
- Sundays74% on time · p90 50 min · 1,335 flights
- Fridays74% on time · p90 50 min · 1,409 flights
- Thursdays72% on time · p90 50 min · 1,373 flights
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