Southwest Airlines departures from Islip, NY (ISP)

Among 2,642 scheduled Southwest Airlines flights departing ISP, 76.6% arrived on time, 13.0% arrived at least 30 minutes late, and 1.5% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Origin and marketing-carrier cohort · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable

76.6%arrived on time

13.0%30+ min late

1.5%cancelled

2,642scheduled flights

Based on July 2025–June 2026; on time means arrival less than 15 minutes late.

30+ minutes late13.0%

60+ minutes late6.2%

Cancelled1.5%

Diverted0.3%

What does the Southwest Airlines ISP sample show?

Southwest Airlines completed 98.1% of its scheduled departures from ISP; 6.2% arrived at least one hour late and 0.3% were diverted.

What were Southwest Airlines at ISP disruption rates?

For Southwest Airlines departures from ISP, 13.0% arrived at least 30 minutes late, 1.5% were cancelled, and 0.3% were diverted.

Compare all airlines at ISP

How large was the Southwest Airlines cohort at ISP?

The Southwest Airlines cohort at ISP contained 2,642 scheduled flights, including 2,593 completed flights, 40 cancellations, and 9 diversions.