75% of SJU → JAX flights arrived on time in June-August 2026 (177 flights). The most reliable was F9 3305, on time 81% of the time on this route. Morning flights did best (81%), afternoon flights worst (70%). SJU (SJU): no delay reported. JAX (JAX): no delay reported.
Best time of day to fly SJU → JAX
| Morning (before noon) | |
| Afternoon (noon-5 PM) |
Flights SJU → JAX, most reliable first
| Flight | Departs | On time on this route | Cancelled |
|---|---|---|---|
| F9 3305 Frontier | 7:00 AM | 3.5% | |
| B6 1742 JetBlue | 12:33 PM | 2.2% |
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From BTS on-time data, June-August 2026; flights with 20+ trips on this route. On-time rates cover each flight number's whole day, which can include other legs. Departure times are local.