Historical on-time performance
Jacksonville to Miami
335 miData through Dec 2025Source: US DOT · BTS
Flights on JAX–MIA arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 1,800 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.
- Envoy AirOn-time81%Medianon timep9035 minCancel1.2%Flights855
- American AirlinesOn-time77%Medianon timep9060 minCancel1.5%Flights945
Why flights run late
Delay causes
- Airline30%
- Weather5%
- Air traffic (NAS)15%
- Late aircraft50%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly JAX → MIA
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 — 88% on time.
- Mornings88% on time · p90 15 min · 1,888 flights
- Middays83% on time · p90 35 min · 1,206 flights
- Afternoons67% on time · p90 65 min · 920 flights
- Evenings63% on time · p90 90 min · 1,130 flights
- Overnights63% on time · p90 100 min · 288 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 81% on time.
- Wednesdays81% on time · p90 40 min · 735 flights
- Tuesdays79% on time · p90 40 min · 779 flights
- Mondays77% on time · p90 55 min · 771 flights
- Thursdays76% on time · p90 55 min · 771 flights
- Fridays76% on time · p90 55 min · 791 flights
- Saturdays75% on time · p90 45 min · 790 flights
- Sundays74% on time · p90 65 min · 795 flights
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