ORIGIN AIRPORT REPORT
ISP
Islip, NY (ISP) departure reliability
Of 4,986 scheduled reportable flights departing ISP, 73.4% arrived on time, 15.8% arrived at least 30 minutes late, and 2.0% were cancelled during July 2025–June 2026.
Source: U.S. Bureau of Transportation Statistics · Origin-airport cohort · Updated September 16, 2026
HISTORICAL ROUTE SIGNALGenerally reliable
73.4%arrived on time
15.8%30+ min late
2.0%cancelled
4,986scheduled flights
MOST-FLOWN DIRECTIONS
ALL ROUTES →Which route from ISP had the largest sample?
ISP to MCO was ISP's largest published route sample, with 1,428 scheduled flights and a 71.0% on-time rate during July 2025–June 2026.
ISP→MCOIslip, NY (ISP) to Orlando, FL (MCO)1,428 flights analyzedGenerally reliable71.0%on timeISP→PBIIslip, NY (ISP) to West Palm Beach/Palm Beach, FL (PBI)1,223 flights analyzedVariable69.9%on timeISP→BWIIslip, NY (ISP) to Baltimore, MD (BWI)1,217 flights analyzedGenerally reliable83.4%on timeISP→TPAIslip, NY (ISP) to Tampa, FL (TPA)460 flights analyzedVariable69.1%on timeISP→FLLIslip, NY (ISP) to Fort Lauderdale, FL (FLL)392 flights analyzedVariable66.8%on time
Which airline was most reliable departing ISP?
Among qualifying ISP airline departure results, Southwest Airlines had the highest on-time rate: 76.6% of 2,642 flights. JetBlue Airways was lowest at 69.2% across 1,471 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 2,642 | 76.6% | 13.0% | 1.5% |
| JetBlue Airways | 1,471 | 69.2% | 18.7% | 2.2% |
| Frontier Airlines | 873 | 70.4% | 19.4% | 3.0% |
Origin report, not airport-wide operations.
These figures summarize the reported scheduled passenger flights in the dataset, not every flight or every airport process.