BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
ISP→FLL

Islip, NY (ISP) to Fort Lauderdale, FL (FLL) flight delay odds

66.8% of 392 official scheduled ISP-to-FLL flights arrived on time; 19.4% arrived at least 30 minutes late and 1.8% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
66.8%arrived on time
19.4%30+ min late
1.8%cancelled
392scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.2%all scheduled flights
120+ minutes late4.6%all scheduled flights
Diverted0.8%did not reach as scheduled
Average arrival+16.6 mincompleted flights

Which departure time was most reliable for ISP to FLL?

Among qualifying ISP-to-FLL departure window results, Late morning had the highest on-time rate: 72.1% of 86 flights. Evening was lowest at 58.1% across 74 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning8672.1%12.8%0.0%
Afternoon18165.7%19.9%2.2%
Evening7458.1%29.7%2.7%

Which weekday was most reliable for ISP to FLL?

Among qualifying ISP-to-FLL weekday results, Wednesday had the highest on-time rate: 89.1% of 55 flights. Monday was lowest at 54.2% across 59 flights.

DayFlightsOn time30+ minCancelled
Monday5954.2%25.4%6.8%
Tuesday5269.2%17.3%0.0%
Wednesday5589.1%5.5%0.0%
Thursday5265.4%17.3%0.0%
Friday5867.2%17.2%1.7%
Saturday6267.7%24.2%1.6%
Sunday5455.6%27.8%1.9%

Which airline was most reliable for ISP to FLL?

Only JetBlue Airways met the ISP-to-FLL airline threshold: 69.2% of 370 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
JetBlue Airways37069.2%18.4%1.6%
Frontier Airlines1921.1%42.1%5.3%
Southwest Airlines366.7%0.0%0.0%

Which month was most reliable for ISP to FLL?

Among qualifying ISP-to-FLL month results, April 2026 had the highest on-time rate: 87.1% of 31 flights. January 2026 was lowest at 47.2% across 36 flights.

MonthFlightsOn time30+ minCancelled
July 20253167.7%12.9%0.0%
August 20253174.2%12.9%0.0%
September 20251866.7%16.7%0.0%
October 20252185.7%14.3%0.0%
November 20253357.6%27.3%0.0%
December 20254553.3%31.1%2.2%
January 20263647.2%27.8%8.3%
February 20263167.7%19.4%3.2%
March 20264557.8%24.4%4.4%
April 20263187.1%9.7%0.0%
May 20263180.6%9.7%0.0%
June 20263974.4%15.4%0.0%

What drove ISP to FLL delay minutes?

Late aircraft was the largest recorded ISP-to-FLL delay category, accounting for 42.5% of 9,245 BTS-attributed delay minutes during July 2025–June 2026.

Airline39.1%
Late aircraft42.5%
National airspace18.0%
Weather0.4%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.