Historical on-time performance
Cleveland to Denver
1,201 miData through May 2026Source: US DOT · BTS
Flights on CLE–DEN arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 1,577 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time87%Medianon timep9020 minCancel0.1%Flights939
- Southwest AirlinesOn-time77%Medianon timep9040 minCancel0.3%Flights576
- Frontier AirlinesOn-time69%Medianon timep9060 minCancel0.0%Flights62
Why flights run late
Delay causes
- Airline20%
- Weather4%
- Air traffic (NAS)40%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline67%
- Weather33%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 3 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 CLE → 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 — 90% on time.
- Mornings90% on time · p90 10 min · 1,991 flights
- Middays87% on time · p90 20 min · 1,205 flights
- Afternoons79% on time · p90 40 min · 1,387 flights
- Evenings60% on time · p90 70 min · 660 flights
- Overnights54% on time · p90 105 min · 265 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 84% on time.
- Wednesdays84% on time · p90 25 min · 747 flights
- Tuesdays84% on time · p90 30 min · 800 flights
- Mondays82% on time · p90 35 min · 815 flights
- Sundays81% on time · p90 35 min · 845 flights
- Fridays80% on time · p90 35 min · 820 flights
- Thursdays79% on time · p90 40 min · 850 flights
- Saturdays79% on time · p90 35 min · 631 flights
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