Airlines at Long Island MacArthur Airport (ISP)
Islip, New York KISP #116 US airport by passengers
Airlines operating at ISP, ranked by number of departures.
On-time performance at ISP
Based on 1,251 departures from May 2026 to July 2026. A flight counts as late when it leaves 15 or more minutes after schedule.
23.4%Departures late
23.8%Arrivals late
1.08%Cancelled
19.9 minAverage departure delay
| Airline | Departures | Late |
|---|---|---|
| Southwest Airlines | 686 | 23.9% |
| JetBlue Airways | 387 | 22.2% |
| Frontier Airlines | 178 | 24.2% |
Source: Bureau of Transportation Statistics, On-Time Performance of reporting carriers. Smaller regional carriers and some airlines are not included.
Airline presence
Avelo, Breeze, Cape Air, Frontier, JetBlue and Southwest operate flights from ISP. The airport departure list shows nonstop service to destinations such as Orlando, Baltimore/Washington, West Palm Beach, Charlotte/Concord, Boston and Myrtle Beach. Schedules change, so confirm with your airline.