About 1 in 3 B6 513 flights from Islip arrived 15+ minutes late, diverted or cancelled over the past year (30%); 1.8% were cancelled. The typical flight landed 5 minutes early.
B6 513: ISP → FLL
Scheduled to leave Islip at 6:00 a.m. local time. Over the past year it arrived on time 70% of the time (342 flights), worse than other B6 flights on the route at that hour (76%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 58% |
| Tuesday | 45 | 67% |
| Wednesday | 52 | 87% |
| Thursday | 43 | 77% |
| Friday | 52 | 69% |
| Saturday | 52 | 73% |
| Sunday | 45 | 62% |
Why it was late
All flights ISP → FLL · Connecting off B6 513? Check the risk
Questions
How often is B6 513 from ISP to FLL late?
JetBlue 513 from Islip, NY to Fort Lauderdale, FL arrived 15 or more minutes late, was diverted or was cancelled on 30% of 342 scheduled flights between September 2025 and August 2026. 1.8% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check JetBlue for today's flight. Method.