Historical on-time performance
Columbus to Denver
1,154 miData through Dec 2025Source: US DOT · BTS
Flights on CMH–DEN arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 1,661 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Southwest AirlinesOn-time75%Medianon timep9050 minCancel0.2%Flights932
- United AirlinesOn-time79%Medianon timep9035 minCancel0.3%Flights729
Why flights run late
Delay causes
- Airline30%
- Weather5%
- Air traffic (NAS)38%
- Late aircraft27%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly CMH → DEN
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 89% on time.
- Mornings89% on time · p90 15 min · 2,119 flights
- Middays85% on time · p90 20 min · 605 flights
- Afternoons73% on time · p90 40 min · 1,370 flights
- Overnights68% on time · p90 75 min · 342 flights
- Evenings60% on time · p90 75 min · 827 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 80% on time.
- Mondays80% on time · p90 35 min · 791 flights
- Wednesdays79% on time · p90 35 min · 705 flights
- Tuesdays79% on time · p90 35 min · 751 flights
- Sundays79% on time · p90 35 min · 783 flights
- Thursdays78% on time · p90 35 min · 830 flights
- Fridays77% on time · p90 40 min · 793 flights
- Saturdays75% on time · p90 40 min · 610 flights
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