Historical on-time performance
St. Thomas to Miami
1,107 miData through May 2026Source: US DOT · BTS
Flights on STT–MIA arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 941 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesOn-time82%Medianon timep9035 minCancel1.1%Flights941
Why flights run late
Delay causes
- Airline51%
- Weather1%
- Air traffic (NAS)10%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline30%
- Weather40%
- Air traffic (NAS)30%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 10 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 STT → MIA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 86% on time.
- Middays86% on time · p90 20 min · 705 flights
- Evenings79% on time · p90 45 min · 899 flights
- Afternoons75% on time · p90 50 min · 1,077 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 85% on time.
- Wednesdays85% on time · p90 20 min · 356 flights
- Tuesdays82% on time · p90 35 min · 357 flights
- Thursdays81% on time · p90 35 min · 386 flights
- Fridays79% on time · p90 40 min · 390 flights
- Mondays79% on time · p90 55 min · 384 flights
- Sundays76% on time · p90 45 min · 390 flights
- Saturdays74% on time · p90 45 min · 418 flights
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