Miami (MIA) to Charlotte Amalie (STT): On-Time Performance
Data through July 2026
When you fly MIA to STT matters as much as anything else about the booking: the route swung from 92% on-time in June 2026 to just 56% in August 2024. Across the full period the route averages 79% on-time against a national 78%.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 2.6
- last 12 months
- Duration
- 2h 47m
- scheduled
- Distance
- 1,107 mi
Monthly on-time trend
Best time to fly from MIA to STT
Aim for departures around 8 a.m. (95% on-time); avoid 12 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 16 min |
| Tuesdaybest | 86% | 9 min |
| Wednesday | 83% | 15 min |
| Thursday | 82% | 9 min |
| Friday | 80% | 11 min |
| Saturday | 73% | 15 min |
| Sunday | 75% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft34%
- Airline operations36%
- National airspace system22%
- Weather8%
Frequently asked questions
- How often are flights from MIA to STT delayed?
- 21% of MIA–STT flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- What is the best time of day to fly from MIA to STT?
- Departures around 8 a.m. have the best record (95% on-time), while departures around 12 p.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to STT?
- The scheduled MIA–STT flight time averages 2h 47m over 1,107 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are MIA to STT flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from MIA to STT?
- August 2024 was the roughest month in this dataset, with only 56% of arrivals on time. The best was June 2026 at 92%. If your dates are flexible, that 37-point gap is worth planning around.
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Based on 1,869 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.