San Juan (SJU) to Charlotte Amalie (STT): On-Time Performance
Data through July 2026
San Juan (SJU) to Charlotte Amalie (STT) is a thinner route than most in this dataset — 357 departures over the past year, roughly 7 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 75% arrived on time.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 0.98
- last 12 months
- Duration
- 39m
- scheduled
- Distance
- 68 mi
Monthly on-time trend
Best time to fly from SJU to STT
Aim for departures around 10 a.m. (91% on-time); avoid 2 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 68% | 29 min |
| Tuesdaybest | 84% | 10 min |
| Wednesday | 82% | 17 min |
| Thursday | 73% | 18 min |
| Friday | 75% | 18 min |
| Saturday | 71% | 19 min |
| Sunday | 72% | 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 aircraft50%
- Airline operations39%
- National airspace system9%
- Weather2%
Frequently asked questions
- How often are flights from SJU to STT delayed?
- 25% of SJU–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 18 minutes.
- What is the best time of day to fly from SJU to STT?
- Departures around 10 a.m. have the best record (91% on-time), while departures around 2 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SJU to STT?
- The scheduled SJU–STT flight time averages 39m over 68 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are SJU 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 SJU to STT?
- February 2026 was the roughest month in this dataset, with only 54% of arrivals on time. The best was March 2025 at 94%. If your dates are flexible, that 40-point gap is worth planning around.
Explore related pages
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Related guides
Based on 867 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.