Historical on-time performance
Miami to St. Thomas
1,107 miData through Dec 2025Source: US DOT · BTS
Flights on MIA–STT arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 869 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesOn-time79%Medianon timep9030 minCancel0.3%Flights869
Why flights run late
Delay causes
- Airline41%
- Weather6%
- Air traffic (NAS)18%
- Late aircraft34%
- Security1%
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 MIA → STT
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 — 91% on time.
- Mornings91% on time · p90 5 min · 507 flights
- Middays77% on time · p90 40 min · 2,060 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 84% on time.
- Tuesdays84% on time · p90 25 min · 351 flights
- Wednesdays83% on time · p90 25 min · 350 flights
- Fridays80% on time · p90 35 min · 373 flights
- Mondays80% on time · p90 45 min · 372 flights
- Thursdays79% on time · p90 35 min · 369 flights
- Sundays79% on time · p90 30 min · 376 flights
- Saturdays76% on time · p90 45 min · 407 flights
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