Historical on-time performance
Miami to Denver
1,709 miData through May 2026Source: US DOT · BTS
Flights on MIA–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)
Cancelled0.6%of scheduled flights
based on 2,256 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time82%Medianon timep9030 minCancel0.1%Flights954
- Frontier AirlinesOn-time76%Medianon timep9040 minCancel2.0%Flights197
- American AirlinesOn-time74%Medianon timep9040 minCancel0.9%Flights884
- Southwest AirlinesOn-time65%Median5 minp9060 minCancel0.0%Flights221
Why flights run late
Delay causes
- Airline32%
- Weather4%
- Air traffic (NAS)24%
- Late aircraft39%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline31%
- Weather62%
- Air traffic (NAS)8%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 13 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 MIA → 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 — 85% on time.
- Mornings85% on time · p90 20 min · 3,426 flights
- Middays71% on time · p90 65 min · 512 flights
- Evenings66% on time · p90 70 min · 560 flights
- Afternoons65% on time · p90 70 min · 1,746 flights
- Overnights61% on time · p90 75 min · 1,276 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 78% on time.
- Wednesdays78% on time · p90 45 min · 980 flights
- Tuesdays77% on time · p90 40 min · 963 flights
- Thursdays74% on time · p90 55 min · 1,079 flights
- Mondays74% on time · p90 50 min · 1,086 flights
- Fridays74% on time · p90 55 min · 1,098 flights
- Saturdays72% on time · p90 55 min · 1,188 flights
- Sundays70% on time · p90 65 min · 1,126 flights
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