Christiansted (STX) to Miami (MIA): On-Time Performance
Data through July 2026
The calendar drives reliability on STX–MIA. February 2025 flights landed on schedule 93% of the time, but August 2024 dropped to 51% — a gap of 42 points. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 77%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 29 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 1.9
- last 12 months
- Duration
- 3h 8m
- scheduled
- Distance
- 1,139 mi
Monthly on-time trend
Best time to fly from STX to MIA
Aim for departures around 8 a.m. (91% on-time); avoid 5 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 32 min |
| Tuesday | 79% | 20 min |
| Wednesdaybest | 85% | 27 min |
| Thursday | 78% | 43 min |
| Friday | 79% | 21 min |
| Saturday | 72% | 38 min |
| Sunday | 72% | 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 aircraft41%
- Airline operations44%
- National airspace system9%
- Weather1%
- Security5%
Frequently asked questions
- How often are flights from STX to MIA delayed?
- 23% of STX–MIA 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 29 minutes.
- What is the best time of day to fly from STX to MIA?
- Departures around 8 a.m. have the best record (91% on-time), while departures around 5 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 STX to MIA?
- The scheduled STX–MIA flight time averages 3h 8m over 1,139 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are STX to MIA 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 STX to MIA?
- August 2024 was the roughest month in this dataset, with only 51% of arrivals on time. The best was February 2025 at 93%. If your dates are flexible, that 42-point gap is worth planning around.
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Based on 1,280 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.