ISP (Islip) to FLL (Fort Lauderdale) flights arrive on time 73% of the time. The most reliable airline on this route is JetBlue Airways at 75%. The average delay is 78 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.ISP → FLL
ISP (Islip) to FLL (Fort Lauderdale)
ISP → FLL on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 73% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
JetBlue Airways edges out Frontier Airlines on this route — 75% vs 70% on time.
Airline Comparison
JetBlue Airways leads at 75% on time; Frontier Airlines trails at 70%.
Accurate?
Good to know
Departing from ISP
77% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at FLL
75% on timeWhen flights into FLL are late, the average delay is 72 minutes. Build buffer if you have ground plans.
If connecting at FLL: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what JetBlue Airways owes you — refund rights, action plan, complaint email. Free.
Flying out of ISP? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.