Route · BWI → ISP · 2020–2025 BTS data
Baltimore to Islip
The BWI–ISP corridor (Baltimore, MD → Islip, NY) runs behind the national average, served by 1 carrier across roughly 220 miles.
Data updated 2026-06-13
- 76.7%
- On-time
- -2.3 pts
- vs US avg
- 55 min
- Delay when late
- 7,398
- Flights
Cancelled
1.1%
Best Month
Feb 2025 90%
Worst Month
Jul 2024 61%
Distance
220 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 93 | 25 | 1 | 2 | WN |
| Nov 2025 | 91 | 18 | 2 | 0 | WN |
| Oct 2025 | 93 | 13 | 0 | 1 | WN |
| Sep 2025 | 90 | 15 | 0 | 0 | WN |
| Aug 2025 | 97 | 26 | 0 | 0 | WN |
| Jul 2025 | 128 | 43 | 8 | 1 | WN |
| Jun 2025 | 123 | 45 | 0 | 0 | WN |
| May 2025 | 114 | 36 | 0 | 0 | WN |
| Apr 2025 | 106 | 22 | 0 | 0 | WN |
| Mar 2025 | 89 | 21 | 2 | 0 | WN |
| Feb 2025 | 82 | 8 | 0 | 0 | WN |
| Jan 2025 | 90 | 15 | 1 | 0 | WN |
| Dec 2024 | 94 | 25 | 1 | 0 | WN |
| Nov 2024 | 89 | 11 | 0 | 0 | WN |
| Oct 2024 | 93 | 17 | 1 | 0 | WN |
| Sep 2024 | 94 | 13 | 0 | 0 | WN |
| Aug 2024 | 100 | 35 | 0 | 0 | WN |
| Jul 2024 | 127 | 49 | 4 | 0 | WN |
| Jun 2024 | 121 | 36 | 1 | 1 | WN |
| May 2024 | 115 | 42 | 0 | 0 | WN |
| Apr 2024 | 111 | 25 | 2 | 0 | WN |
| Mar 2024 | 108 | 28 | 0 | 0 | WN |
| Feb 2024 | 97 | 13 | 1 | 0 | WN |
| Jan 2024 | 112 | 43 | 2 | 0 | WN |
Cancellation Rate
1.1%
26 of 2,457 flights
Diversion Rate
0.2%
5 of 2,457 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
Origin airport →ISP - Islip
Full on-time, delay-cause, and seasonal performance for Islip, NY.
Destination airport →Compare the two airports
See BWI 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 BWI–ISP.
Routes with a similar on-time rate
What the Data Says About BWI to ISP
The Baltimore to Islip corridor (BWI to ISP) posts a 76.7% on-time rate on the lower edge of the average band, based on 7,398 tracked flights. Late flights run 55.3 minutes behind on average. 1 carrier cover the 220-mile route; over the last 24 months, 26 of 2,457 flights were cancelled (1.1%) and 0.2% diverted.
The monthly split is wide on this route: Feb 2025 posted the strongest performance at 90% on-time, while Jul 2024 came in at just 61% - a 29-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from BWI to ISP? ▼
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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.