Best Time to Fly FLL to ISP: On-Time Stats by Hour & Airline
Fort Lauderdale-Hollywood International → Long Island MacArthur
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.1% of Fort Lauderdale (FLL) to Islip (ISP) flights arrived on time (406 scheduled flights). That is 6.6 points below the national average of 77.6%.
JetBlue was the only reporting airline with regular flights on this route.
June has been the best month (89% on time) and Sunday the weakest day of the week (54%).
2.2% of flights were cancelled, versus 1.8% nationally.
FLL to ISP 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 | 72.7% | 65 min | 2.1% | 384 |
| Frontier Airlines | Limited data | 19 | ||
| Southwest Airlines | Limited data | 3 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly FLL to ISP
On-time arrival % by scheduled departure hour (local time), 746 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 87.7% | 2.7% | 75 |
| 8am–9am | 91.7% | 0.9% | 219 |
| 9am–10am | Limited data | 13 | |
| 10am–11am | Limited data | 21 | |
| 11am–12pm | 65.7% | 1.4% | 72 |
| 12pm–1pm | Limited data | 9 | |
| 1pm–2pm | 77.8% | 1.8% | 55 |
| 2pm–3pm | Limited data | 9 | |
| 3pm–4pm | 63.3% | 2.0% | 50 |
| 4pm–5pm | 57.1% | 2.0% | 50 |
| 5pm–6pm | 70.0% | 0.0% | 41 |
| 6pm–7pm | Limited data | 29 | |
| 7pm–8pm | Limited data | 18 | |
| 8pm–9pm | Limited data | 28 | |
| 9pm–10pm | Limited data | 27 | |
| 10pm–11pm | Limited data | 30 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on FLL to ISP
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) | 54.0% | -24.0 pts | 7.4% | 54 |
| Summer peak (Jun 15 - Aug 15) | 72.1% | -6.0 pts | 1.4% | 139 |
| All other days | 78.0% | — | 1.7% | 541 |
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).