ISP (Islip) to TPA (Tampa) flights arrive on time 75% of the time. The most reliable airline on this route is Southwest Airlines at 76%. 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 March 2026.ISP → TPA
ISP (Islip) to TPA (Tampa)
ISP → TPA on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 75% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Airlines are roughly equal on this route — Southwest Airlines leads slightly at 76% vs Frontier Airlines at 76%.
Airline Comparison
Southwest Airlines leads at 76% on time; Frontier Airlines trails at 76%.
Accurate?
Good to know
Departing from ISP
77% on timeTSA is currently ~14 min. Best time: 4 AM (about 5 min).
ISP cancels 2.1% of flights — higher than average. Have a backup plan.
Arriving at TPA
79% on timeWhen flights into TPA are late, the average delay is 70 minutes. Build buffer if you have ground plans.
If connecting at TPA: TSA is ~10 min right now. Allow at least 60 minutes for a domestic connection.
TPA has a 2.1% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.