Christiansted (STX) to San Juan (SJU): On-Time Performance
Data through July 2026
Christiansted (STX) to San Juan (SJU) is a thinner route than most in this dataset — 317 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 78% arrived on time.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 0.87
- last 12 months
- Duration
- 49m
- scheduled
- Distance
- 94 mi
Monthly on-time trend
Best time to fly from STX to SJU
Aim for departures around 2 p.m. (82% on-time); avoid 5 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 10 min |
| Tuesday | 79% | 8 min |
| Wednesdaybest | 84% | 9 min |
| Thursday | 79% | 13 min |
| Friday | 80% | 12 min |
| Saturday | 75% | 13 min |
| Sunday | 68% | 26 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft73%
- Airline operations17%
- National airspace system9%
- Security1%
Frequently asked questions
- How often are flights from STX to SJU delayed?
- 22% of STX–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 13 minutes.
- What is the best time of day to fly from STX to SJU?
- Departures around 2 p.m. have the best record (82% on-time), while departures around 5 p.m. have the worst (59%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STX to SJU?
- The scheduled STX–SJU flight time averages 49m over 94 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are STX to SJU flights cancelled?
- 0.7% 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 SJU?
- July 2026 was the roughest month in this dataset, with only 61% of arrivals on time. The best was May 2025 at 97%. If your dates are flexible, that 36-point gap is worth planning around.
Explore related pages
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Related guides
Based on 558 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.