Charlotte Amalie (STT) to San Juan (SJU): On-Time Performance
Data through July 2026
The calendar drives reliability on STT–SJU. May 2026 flights landed on schedule 94% of the time, but January 2026 dropped to 58% — a gap of 36 points. Across the full period the route averages 73% on-time against a national 78%.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 22 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 1.5
- last 12 months
- Duration
- 47m
- scheduled
- Distance
- 68 mi
Monthly on-time trend
Best time to fly from STT to SJU
Aim for departures around 1 p.m. (77% on-time); avoid 2 p.m. departures (69%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 68% | 38 min |
| Tuesdaybest | 84% | 11 min |
| Wednesday | 78% | 16 min |
| Thursday | 74% | 20 min |
| Friday | 72% | 20 min |
| Saturday | 67% | 28 min |
| Sunday | 71% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft59%
- Airline operations26%
- National airspace system13%
- Weather2%
Frequently asked questions
- How often are flights from STT to SJU delayed?
- 27% of STT–SJU 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 22 minutes.
- What is the best time of day to fly from STT to SJU?
- Departures around 1 p.m. have the best record (77% on-time), while departures around 2 p.m. have the worst (69%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STT to SJU?
- The scheduled STT–SJU flight time averages 47m over 68 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are STT to SJU flights cancelled?
- 1.2% 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 STT to SJU?
- January 2026 was the roughest month in this dataset, with only 58% of arrivals on time. The best was May 2026 at 94%. If your dates are flexible, that 36-point gap is worth planning around.
Explore related pages
More routes from STT
Other ways to fly to San Juan (SJU)
Related guides
Based on 1,203 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.