Route · ISP → PBI · 2020–2025 BTS data
Islip to West Palm Beach/Palm Beach
The ISP–PBI corridor (Islip, NY → West Palm Beach/Palm Beach, FL) runs behind the national average, served by 8 carriers across roughly 1,052 miles.
Data updated 2026-06-13
- 76.2%
- On-time
- -2.8 pts
- vs US avg
- 74 min
- Delay when late
- 4,604
- Flights
Cancelled
1.1%
Best Month
Nov 2024 93%
Worst Month
Dec 2025 58%
Distance
1,052 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 133 | 56 | 2 | 0 | B6,WN,F9 |
| Nov 2025 | 100 | 24 | 2 | 0 | B6,WN |
| Oct 2025 | 93 | 17 | 0 | 2 | B6,WN |
| Sep 2025 | 86 | 21 | 0 | 0 | WN,B6 |
| Aug 2025 | 88 | 22 | 0 | 1 | WN,B6 |
| Jul 2025 | 94 | 25 | 2 | 3 | B6,WN,F9 |
| Jun 2025 | 103 | 32 | 0 | 0 | B6,WN,F9 |
| May 2025 | 113 | 26 | 1 | 1 | B6,WN,F9 |
| Apr 2025 | 120 | 19 | 0 | 0 | F9,WN,B6 |
| Mar 2025 | 128 | 23 | 2 | 0 | B6,WN,F9 |
| Feb 2025 | 104 | 30 | 0 | 0 | B6,WN,F9 |
| Jan 2025 | 109 | 35 | 0 | 0 | B6,WN,F9 |
| Dec 2024 | 109 | 45 | 1 | 0 | B6,F9,WN |
| Nov 2024 | 74 | 5 | 0 | 0 | B6,WN |
| Oct 2024 | 61 | 9 | 3 | 0 | WN,B6 |
| Sep 2024 | 47 | 7 | 0 | 0 | WN |
| Aug 2024 | 55 | 21 | 1 | 1 | F9,WN |
| Jul 2024 | 74 | 14 | 1 | 0 | F9,WN |
| Jun 2024 | 73 | 8 | 2 | 0 | F9,WN |
| May 2024 | 83 | 14 | 0 | 1 | F9,WN |
| Apr 2024 | 91 | 16 | 2 | 0 | F9,WN |
| Mar 2024 | 97 | 24 | 3 | 0 | F9,WN |
| Feb 2024 | 100 | 12 | 2 | 0 | F9,WN |
| Jan 2024 | 124 | 35 | 1 | 0 | F9,WN |
Cancellation Rate
1.1%
25 of 2,259 flights
Diversion Rate
0.4%
9 of 2,259 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 →PBI - West Palm Beach/Palm Beach
Full on-time, delay-cause, and seasonal performance for West Palm Beach/Palm Beach, FL.
Destination airport →Compare the two airports
See ISP and PBI 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–PBI.
Routes with a similar on-time rate
What the Data Says About ISP to PBI
The Islip to West Palm Beach/Palm Beach corridor (ISP to PBI) posts a 76.2% on-time rate on the lower edge of the average band, based on 4,604 tracked flights. Late flights run 73.5 minutes behind on average. 8 carriers cover the 1,052-mile route; over the last 24 months, 25 of 2,259 flights were cancelled (1.1%) and 0.4% diverted.
The monthly split is wide on this route: Nov 2024 posted the strongest performance at 93% on-time, while Dec 2025 came in at just 58% - a 35-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.