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

Islip, NY (ISP) to West Palm Beach/Palm Beach, FL (PBI) flight delay odds

69.9% of 1,223 official scheduled ISP-to-PBI flights arrived on time; 17.7% arrived at least 30 minutes late and 2.1% 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
69.9%arrived on time
17.7%30+ min late
2.1%cancelled
1,223scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.1%all scheduled flights
120+ minutes late4.3%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+13.5 mincompleted flights

Which departure time was most reliable for ISP to PBI?

Among qualifying ISP-to-PBI departure window results, Early morning had the highest on-time rate: 83.1% of 284 flights. Afternoon was lowest at 62.3% across 684 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning28483.1%9.5%2.5%
Late morning16481.1%9.1%2.4%
Afternoon68462.3%22.5%1.9%
Evening8665.1%23.3%2.3%

Which weekday was most reliable for ISP to PBI?

Among qualifying ISP-to-PBI weekday results, Friday had the highest on-time rate: 74.7% of 174 flights. Sunday was lowest at 62.8% across 183 flights.

DayFlightsOn time30+ minCancelled
Monday17566.9%19.4%5.7%
Tuesday17771.8%13.0%1.1%
Wednesday17174.3%17.0%0.0%
Thursday17669.9%21.0%0.6%
Friday17474.7%17.2%0.0%
Saturday16769.5%16.2%1.8%
Sunday18362.8%19.7%5.5%

Which airline was most reliable for ISP to PBI?

Among qualifying ISP-to-PBI airline results, JetBlue Airways had the highest on-time rate: 70.2% of 541 flights. Frontier Airlines was lowest at 67.6% across 71 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines61169.9%16.4%1.6%
JetBlue Airways54170.2%19.0%2.4%
Frontier Airlines7167.6%18.3%4.2%

Which month was most reliable for ISP to PBI?

Among qualifying ISP-to-PBI month results, June 2026 had the highest on-time rate: 86.1% of 79 flights. December 2025 was lowest at 56.4% across 133 flights.

MonthFlightsOn time30+ minCancelled
July 20259468.1%21.3%2.1%
August 20258873.9%17.0%0.0%
September 20258675.6%11.6%0.0%
October 20259379.6%11.8%0.0%
November 202510074.0%14.0%2.0%
December 202513356.4%29.3%1.5%
January 202613060.8%20.8%3.1%
February 202613366.2%17.3%8.3%
March 20269864.3%22.4%3.1%
April 202610669.8%20.8%1.9%
May 20268379.5%8.4%0.0%
June 20267986.1%7.6%0.0%

What drove ISP to PBI delay minutes?

Late aircraft was the largest recorded ISP-to-PBI delay category, accounting for 40.5% of 23,481 BTS-attributed delay minutes during July 2025–June 2026.

Airline31.8%
Late aircraft40.5%
National airspace24.5%
Weather3.2%
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.