Best Time to Fly SJU to JAX: On-Time Stats by Hour & Airline
Luis Munoz Marin International → Jacksonville International
Data through July 2026 · Last updated October 18, 2026
261 flights were scheduled from San Juan (SJU) to Jacksonville (JAX) in the last 12 months, and 78.8% of those that flew arrived on time, 1.2 points above the US average of 77.6%.
JetBlue was the most punctual of the 2 airlines on the route at 80.0%, while Frontier Airlines trailed at 77.9%.
May has been the best month (88% on time) and Tuesday the weakest day of the week (57%).
2.3% of flights were cancelled, versus 1.8% nationally.
SJU to JAX on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue | 80.0% | 76 min | 1.7% | 117 |
| Frontier Airlines | 77.9% | 99 min | 2.8% | 144 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJU to JAX
On-time arrival % by scheduled departure hour (local time), 408 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 7 | |
| 6am–7am | 78.8% | 2.9% | 34 |
| 7am–8am | 90.9% | 0.9% | 111 |
| 8am–9am | Limited data | 1 | |
| 10am–11am | Limited data | 11 | |
| 11am–12pm | Limited data | 11 | |
| 12pm–1pm | 82.6% | 1.4% | 70 |
| 1pm–2pm | Limited data | 8 | |
| 2pm–3pm | Limited data | 29 | |
| 3pm–4pm | Limited data | 17 | |
| 4pm–5pm | 67.7% | 0.0% | 31 |
| 5pm–6pm | 50.0% | 4.6% | 65 |
| 6pm–7pm | Limited data | 10 | |
| 7pm–8pm | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJU to JAX
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 12 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 81.6% | +3.3 pts | 2.0% | 150 |
| All other days | 78.3% | — | 1.9% | 216 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).