Historical on-time performance
Miami to Key West
125 miData through May 2026Source: US DOT · BTS
Flights on MIA–EYW arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 1,160 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time86%Medianon timep9020 minCancel0.6%Flights1,160
Why flights run late
Delay causes
- Airline19%
- Weather14%
- Air traffic (NAS)26%
- Late aircraft41%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather29%
- Air traffic (NAS)71%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 7 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 → EYW
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Overnights are the most reliable time of day to fly this route — 94% on time.
- Overnights94% on time · p90 5 min · 107 flights · limited
- Mornings88% on time · p90 15 min · 339 flights
- Middays83% on time · p90 25 min · 1,548 flights
- Evenings81% on time · p90 25 min · 1,004 flights
- Afternoons81% on time · p90 30 min · 699 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 87% on time.
- Tuesdays87% on time · p90 20 min · 523 flights
- Wednesdays87% on time · p90 15 min · 500 flights
- Mondays85% on time · p90 20 min · 529 flights
- Fridays82% on time · p90 25 min · 531 flights
- Thursdays82% on time · p90 25 min · 512 flights
- Sundays80% on time · p90 30 min · 533 flights
- Saturdays77% on time · p90 40 min · 569 flights
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