Miami (MIA) to Christiansted (STX): On-Time Performance
Data through July 2026
When you fly MIA to STX matters as much as anything else about the booking: the route swung from 93% on-time in February 2025 to just 57% in August 2024. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (79% vs 70%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 1.9
- last 12 months
- Duration
- 2h 52m
- scheduled
- Distance
- 1,139 mi
Monthly on-time trend
Best time to fly from MIA to STX
Aim for departures around 9 a.m. (86% on-time); avoid 1 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 20 min |
| Tuesday | 76% | 12 min |
| Wednesdaybest | 81% | 12 min |
| Thursday | 79% | 13 min |
| Friday | 79% | 14 min |
| Saturday | 68% | 16 min |
| Sunday | 70% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations35%
- National airspace system15%
- Weather5%
Frequently asked questions
- How often are flights from MIA to STX delayed?
- 25% of MIA–STX 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 15 minutes.
- What is the best time of day to fly from MIA to STX?
- Departures around 9 a.m. have the best record (86% on-time), while departures around 1 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to STX?
- The scheduled MIA–STX flight time averages 2h 52m over 1,139 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are MIA to STX flights cancelled?
- 0.4% 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 STX?
- August 2024 was the roughest month in this dataset, with only 57% of arrivals on time. The best was February 2025 at 93%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 1,281 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.