Route Reliability
San Juan → Jacksonville
SJU–JAX · 1,288 miles · Luis Muñoz Marín International Airport to Jacksonville International Airport
- 84%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 2.7%
- Cancelled
- 182
- Flights in the data
Data through May 2026.
Airlines on this route
- Frontier Airlines84% on time · 125 flights
- JetBlue Airways84% on time · 57 flights
Too little history on this route to call a winner. We rank airlines only after 100 flights each.
What the data says
Morning flights do better here.
SJU–JAX flights departing between 6–9 AM arrived on time 95% of the time, versus 62% between 3–6 PM.
Wednesdays have been rough.
SJU–JAX flights arrived on time 94% of the time on Fridays and just 75% on Wednesdays. That gap is worth planning around.
Trending in the right direction.
SJU–JAX flights arrived on time 86% of the time over the last three months in the data, compared with 63% in the three months before that.
Flights on this route
The breakdown
- Mon79%(28 flights)
- Tue—(9 flights)
- Wed75%(16 flights)
- Thu90%(29 flights)
- Fri94%(34 flights)
- Sat79%(29 flights)
- Sun88%(32 flights)
- 6–9 AM95%(79 flights)
- 12–3 PM84%(56 flights)
- 3–6 PM62%(42 flights)
Jun 95% → May 92% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 95% | 21 |
| July 2025 | 100% | 20 |
| August 2025 | 69% | 13 |
| December 2025 | 60% | 20 |
| January 2026 | 60% | 10 |
| March 2026 | 80% | 10 |
| April 2026 | 87% | 23 |
| May 2026 | 92% | 52 |
Keep nerding
Based on 182 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.