66% of flights from Fort Lauderdale to San Juan arrived on time over the past 12 months. That is worse than the typical U.S. route. The 7 a.m. departures ran on time 92% of the time; the 9 p.m. ones 43%. Most reliable airline: JetBlue (68%). 12% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for FLL → SJU: when a flight was late, it was under 45 minutes late 56% of the time. About 1 in 10 flights landed an hour or more late, and 1 in 56 three hours or more; 1.6% were cancelled outright.
- On time or early66%
- 15–30 min late12%
- 30–60 min late11%
- 1–2 hours late5.9%
- 2–3 hours late2.2%
- 3+ hours late1.8%
- Diverted0.1%
- Cancelled1.6%
Share of all 2,358 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| JetBlue | 1,718 | 68% | 1.6% | −2 min | 9.3% | +60 min | JetBlue |
| Spirit Airlines | 242 | 51% | 2.1% | +13 min | 16.1% | +69 min | Spirit Airlines |
| Southwest Airlines | 225 | 65% | 0.4% | +5 min | 6.7% | +41 min | Southwest Airlines |
| Frontier Airlines | 173 | 63% | 2.3% | +5 min | 11.6% | +106 min | Frontier Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at FLL). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | JetBlue | Frontier Airlines |
|---|---|---|
| 6 a.m. | 90% | — |
| 7 a.m. | 93% | — |
| 11 a.m. | 58% | — |
| 1 p.m. | — | 61% |
| 2 p.m. | 59% | — |
| 4 p.m. | 67% | — |
| 5 p.m. | 73% | — |
| 6 p.m. | 67% | — |
| 9 p.m. | 40% | — |
Last flight of the day
On FLL → SJU, each airline's last flight of the day was cancelled 1.4% of the time, against 1.8% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 1.9% of the time (earlier flights: 1.9%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| JetBlue | 8:37 p.m. | 0.8% | 2.2% | 1.8% | first flight 6:40 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
By month
Each calendar month pooled over 2023–2026. Best: October (78%). Worst: March (64%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 362 | 63% | 1.7% |
| Tuesday | 288 | 76% | 0.7% |
| Wednesday | 290 | 75% | 0.0% |
| Thursday | 346 | 70% | 0.3% |
| Friday | 357 | 65% | 0.3% |
| Saturday | 347 | 59% | 4.0% |
| Sunday | 368 | 57% | 3.5% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: air traffic/airport 20 · airline 13 · weather 4
Month by month
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| B6 1553 | 11:10 a.m. | 347 | 58% | 1.1% | +8 min | JetBlue |
| F9 3018 | 1:17 p.m. | 127 | 61% | 3.1% | +4 min | Frontier Airlines |
| B6 1453 | 5:40 p.m. | 309 | 69% | 1.6% | +1 min | JetBlue |
| B6 553 | 5:45 p.m. | 304 | 82% | 1.6% | −8 min | JetBlue |
| B6 2153 | 8:37 p.m. | 126 | 56% | 0.8% | +8 min | JetBlue |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jan 3, 2026 | 10 | 0% | 10 |
| Jan 5, 2026 | 10 | 10% | 0 |
| Mar 16, 2026 | 8 | 13% | 3 |
| Aug 3, 2026 | 7 | 14% | 1 |
| Jul 20, 2026 | 7 | 14% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Fort Lauderdale or San Juan. MIA → SJU has been 10 points more reliable.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| FLL → SJU (this route) | 2,358 | 66% | 1.6% |
| MIA → SJU Miami to San Juan | 2,645 | 76% | 0.9% |
Questions
How often are flights from FLL to SJU on time?
66% of 2,358 scheduled flights from Fort Lauderdale, FL to San Juan, PR arrived within 15 minutes of schedule between September 2025 and August 2026. 1.6% were cancelled.
What is the best time of day to fly FLL to SJU?
Flights scheduled to leave at 7 a.m. were the most reliable (92% on time). The 9 p.m. departures were the least (43%).
Which airline is most on time from FLL to SJU?
JetBlue: 68% of its 1,718 flights on the route arrived on time. Spirit Airlines: 51%. Southwest Airlines: 65%. Frontier Airlines: 63%.
What month has the most delays from FLL to SJU?
March (64% on time). The best month is October (78%), over 2023–2026.
Is the last flight of the day from FLL to SJU more likely to be cancelled?
No, the opposite. Each airline's last FLL–SJU flight of the day was cancelled 1.4% of the time over the past year, against 1.8% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- SJU → FLL (return)
- Fort Lauderdale (FLL) delays by hour
- Flights into San Juan (SJU)
- JetBlue on-time record
- Spirit Airlines on-time record
- Southwest Airlines on-time record
- Frontier Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.