Historical on-time performance
Denver to Miami
1,709 miData through Dec 2025Source: US DOT · BTS
Flights on DEN–MIA arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 2,393 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.
- American AirlinesOn-time74%Medianon timep9045 minCancel0.6%Flights883
- United AirlinesOn-time73%Medianon timep9045 minCancel0.2%Flights1,007
- Frontier AirlinesOn-time70%Medianon timep9050 minCancel1.3%Flights235
- Southwest AirlinesOn-time66%Medianon timep9075 minCancel0.4%Flights268
Why flights run late
Delay causes
- Airline40%
- Weather4%
- Air traffic (NAS)22%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DEN → MIA
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 63% to 75% on time.
- Early mornings75% on time · p90 40 min · 1,040 flights
- Mornings73% on time · p90 50 min · 1,465 flights
- Overnights71% on time · p90 45 min · 906 flights
- Middays69% on time · p90 55 min · 1,735 flights
- Afternoons68% on time · p90 70 min · 1,014 flights
- Evenings63% on time · p90 75 min · 1,207 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 74% on time.
- Tuesdays74% on time · p90 45 min · 963 flights
- Wednesdays71% on time · p90 50 min · 984 flights
- Mondays70% on time · p90 55 min · 1,057 flights
- Thursdays69% on time · p90 55 min · 1,037 flights
- Sundays69% on time · p90 60 min · 1,105 flights
- Saturdays68% on time · p90 55 min · 1,160 flights
- Fridays67% on time · p90 60 min · 1,061 flights
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