Jacksonville (JAX) to San Juan (SJU): On-Time Performance
Data through May 2026
Jacksonville (JAX) to San Juan (SJU) is a thinner route than most in this dataset — 182 departures over the past year, roughly 4 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 73% arrived on time. Cancellations are the bigger caveat: 4.9% of scheduled flights never departed.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 35 min
- completed flights
- Cancelled
- 4.9%
- Flights/day
- 0.50
- last 12 months
- Duration
- 3h 3m
- scheduled
- Distance
- 1,288 mi
Monthly on-time trend
Best time to fly from JAX to SJU
Aim for departures around 11 a.m. (92% on-time); avoid 8 p.m. departures (50%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 69% | 59 min |
| Tuesday | 62% | 32 min |
| Wednesday | 80% | 24 min |
| Thursdaybest | 80% | 17 min |
| Friday | 79% | 10 min |
| Saturday | 61% | 94 min |
| Sunday | 77% | 10 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft61%
- Airline operations36%
- National airspace system3%
Frequently asked questions
- How often are flights from JAX to SJU delayed?
- 27% of JAX–SJU flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 35 minutes.
- What is the best time of day to fly from JAX to SJU?
- Departures around 11 a.m. have the best record (92% on-time), while departures around 8 p.m. have the worst (50%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from JAX to SJU?
- The scheduled JAX–SJU flight time averages 3h 3m over 1,288 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are JAX to SJU flights cancelled?
- 4.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What day of the week is most reliable for JAX to SJU?
- Thursday flights have the best record at 80% on-time. Day-of-week differences on this route are meaningful — Saturday trails at 61%.
Explore related pages
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Other ways to fly to San Juan (SJU)
Related guides
Based on 346 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.