Route · FLL → ISP · 2020–2025 BTS data
Fort Lauderdale to Islip
The FLL–ISP corridor (Fort Lauderdale, FL → Islip, NY) runs behind the national average, served by 8 carriers across roughly 1,092 miles.
Data updated 2026-06-13
- 74.4%
- On-time
- -4.6 pts
- vs US avg
- 71 min
- Delay when late
- 1,202
- Flights
Cancelled
2.8%
Best Month
May 2025 81%
Worst Month
Mar 2022 45%
Distance
1,092 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 46 | 17 | 1 | 0 | F9,B6 |
| Nov 2025 | 33 | 10 | 0 | 0 | B6 |
| Aug 2025 | 31 | 1 | 0 | 0 | B6 |
| Jul 2025 | 31 | 5 | 0 | 0 | B6 |
| May 2025 | 52 | 10 | 0 | 0 | B6,F9 |
| Apr 2025 | 47 | 5 | 0 | 0 | F9,B6 |
| Mar 2025 | 35 | 7 | 1 | 1 | B6,WN,F9 |
| Feb 2025 | 35 | 6 | 0 | 0 | B6,WN,F9 |
| Dec 2024 | 32 | 4 | 2 | 0 | B6,F9 |
| Aug 2024 | 36 | 17 | 3 | 0 | F9 |
| Jul 2024 | 31 | 13 | 1 | 0 | F9 |
| Jun 2024 | 30 | 9 | 1 | 0 | F9 |
| May 2024 | 31 | 6 | 1 | 0 | F9 |
| Apr 2024 | 30 | 3 | 1 | 1 | F9 |
| Mar 2024 | 33 | 14 | 0 | 1 | F9,WN |
| Feb 2024 | 30 | 8 | 0 | 0 | F9,WN |
| Dec 2023 | 38 | 18 | 3 | 0 | F9,WN |
| Aug 2023 | 31 | 15 | 0 | 0 | F9 |
| Jul 2023 | 31 | 15 | 0 | 0 | F9 |
| Jun 2023 | 30 | 9 | 2 | 0 | F9 |
| May 2022 | 31 | 4 | 1 | 0 | F9 |
| Mar 2022 | 60 | 33 | 2 | 0 | F9,WN |
| Feb 2022 | 40 | 13 | 0 | 0 | F9,WN |
| Jan 2022 | 31 | 5 | 5 | 0 | WN |
Cancellation Rate
2.8%
24 of 855 flights
Diversion Rate
0.4%
3 of 855 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
FLL - Fort Lauderdale
Full on-time, delay-cause, and seasonal performance for Fort Lauderdale, FL.
Origin airport →ISP - Islip
Full on-time, delay-cause, and seasonal performance for Islip, NY.
Destination airport →Compare the two airports
See FLL and ISP side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to FLL–ISP.
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What the Data Says About FLL to ISP
On-time performance on the FLL to ISP pairing (Fort Lauderdale to Islip) trails a chunk of the network: 74.4% of 1,202 tracked flights arrived on schedule, with a 71.0-minute average delay on the ones that ran late. The route spans about 1,092 miles across 8 carriers. Cancellations over the trailing 24 months hit 2.8% (24 of 855 flights), with 0.4% diverted.
The monthly split is wide on this route: May 2025 posted the strongest performance at 81% on-time, while Mar 2022 came in at just 45% - a 36-point swing worth factoring into travel timing.
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.