SJU to JAX flight delays & on-time performance
Nonstop flights from Luis Munoz Marin International Airport to Jacksonville International Airport · 1,288 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SJU or JAX right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Juan (SJU) to Jacksonville (JAX) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.3% were cancelled, and 9% arrived an hour or more late.
- JetBlue was the most punctual airline here (80% on time); Frontier Airlines was the least (78%).
- Departures scheduled around 7am did best (87% on time); around 5pm did worst (50%).
- Friday was the most reliable day to fly (86% on time) and Tuesday the least (63%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (49%).
Which airline is most on time from SJU to JAX?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| JetBlue | 80% | 1.7% | 16 min | 8.7% | 117 |
| Frontier Airlines | 78% | 2.8% | 23 min | 8.6% | 144 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am79%29 flights
- 7am87%75 flights
- 11am91%11 flights
- 12pm83%64 flights
- 2pm78%23 flights
- 3pm67%13 flights
- 4pm64%14 flights
- 5pm50%23 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday66%5.0% cancelled
- Tuesday63%0.0% cancelled
- Wednesday85%0.0% cancelled
- Thursday81%0.0% cancelled
- Friday86%2.2% cancelled
- Saturday82%2.6% cancelled
- Sunday84%5.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)49%
- Late-arriving aircraft46%
- Air traffic control & airport congestion5%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather83%
- Air traffic control & airport congestion17%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
SJU to JAX: common questions
- How often are SJU to JAX flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Juan to Jacksonville cancelled?
- 2.3% of scheduled flights were cancelled (6 of 261).
- How long are typical delays?
- Across all flights the average arrival delay was 20 min (early arrivals count as zero). Flights that were late arrived 89 min behind schedule on average, and 8.6% of flights were an hour or more late.
- How long is taxi time at SJU?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: JAX to SJU — 72% on time
More flights from San Juan
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SJU → JAX, nonstop flights by US airlines that report to the DOT. How we calculate this.