ISP (Islip) to PBI (West Palm Beach) flights arrive on time 78% of the time. The most reliable airline on this route is Southwest Airlines at 81%. The average delay is 82 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.ISP → PBI
ISP (Islip) to PBI (West Palm Beach)
ISP → PBI on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is on time most of the time. About 78% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Southwest Airlines edges out JetBlue Airways on this route — 81% vs 71% on time.
Airline Comparison
Southwest Airlines leads at 81% on time; JetBlue Airways trails at 71%.
Accurate?
Good to know
Departing from ISP
77% on timeTSA is currently ~7 min. Best time: 4 AM (about 5 min).
ISP cancels 2.1% of flights — higher than average. Have a backup plan.
Arriving at PBI
76% on timeWhen flights into PBI are late, the average delay is 76 minutes. Build buffer if you have ground plans.
If connecting at PBI: TSA is ~19 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
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Data last updated May 2026. Source: Bureau of Transportation Statistics.