Route · ISP → FLL · 2020–2025 BTS data
Islip to Fort Lauderdale
The ISP–FLL corridor (Islip, NY → Fort Lauderdale, FL) runs behind the national average, served by 8 carriers across roughly 1,092 miles.
Data updated 2026-06-13
- 78.1%
- On-time
- -0.9 pts
- vs US avg
- 76 min
- Delay when late
- 1,139
- Flights
Cancelled
2.3%
Best Month
May 2025 71%
Worst Month
Mar 2022 68%
Distance
1,092 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 45 | 20 | 1 | 0 | F9,B6 |
| Nov 2025 | 33 | 14 | 0 | 0 | B6 |
| Aug 2025 | 31 | 8 | 0 | 0 | B6 |
| Jul 2025 | 31 | 9 | 0 | 1 | B6 |
| May 2025 | 52 | 15 | 0 | 0 | B6,F9 |
| Apr 2025 | 47 | 7 | 0 | 0 | F9,B6 |
| Mar 2025 | 35 | 9 | 1 | 0 | B6,WN,F9 |
| Feb 2025 | 35 | 11 | 0 | 0 | B6,WN,F9 |
| Dec 2024 | 32 | 9 | 0 | 0 | B6,F9 |
| Aug 2024 | 36 | 12 | 1 | 0 | F9 |
| Jul 2024 | 31 | 7 | 1 | 0 | F9 |
| Jun 2024 | 30 | 4 | 0 | 0 | F9 |
| May 2024 | 31 | 5 | 1 | 0 | F9 |
| Apr 2024 | 30 | 3 | 1 | 0 | F9 |
| Mar 2024 | 33 | 10 | 0 | 0 | F9,WN |
| Feb 2024 | 30 | 4 | 0 | 1 | F9,WN |
| Dec 2023 | 38 | 14 | 3 | 0 | F9,WN |
| Aug 2023 | 31 | 4 | 1 | 0 | F9 |
| Jul 2023 | 31 | 5 | 2 | 0 | F9 |
| Jun 2023 | 30 | 3 | 2 | 0 | F9 |
| May 2022 | 31 | 9 | 1 | 0 | F9 |
| Mar 2022 | 60 | 19 | 5 | 0 | F9,WN |
| Feb 2022 | 40 | 10 | 0 | 1 | F9,WN |
| May 2021 | 31 | 10 | 0 | 0 | WN |
Cancellation Rate
2.3%
20 of 854 flights
Diversion Rate
0.4%
3 of 854 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ISP - Islip
Full on-time, delay-cause, and seasonal performance for Islip, NY.
Origin airport →FLL - Fort Lauderdale
Full on-time, delay-cause, and seasonal performance for Fort Lauderdale, FL.
Destination airport →Compare the two airports
See ISP and FLL side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to ISP–FLL.
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What the Data Says About ISP to FLL
The Islip to Fort Lauderdale corridor (ISP to FLL) posts a 78.1% on-time rate on the lower edge of the average band, based on 1,139 tracked flights. Late flights run 75.8 minutes behind on average. 8 carriers cover the 1,092-mile route; over the last 24 months, 20 of 854 flights were cancelled (2.3%) and 0.4% diverted.
Monthly on-time rates stay fairly consistent on this route, ranging from 68% in Mar 2022 to 71% in May 2025 - only a 3-point spread.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.