ISP (Islip) to BNA (Nashville) flights arrive on time 93% of the time. The most reliable airline on this route is Southwest Airlines at 93%. The average delay is 20 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.ISP → BNA
ISP (Islip) to BNA (Nashville)
ISP → BNA on-time performance by month
23
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is usually on time. About 93% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Accurate?
Good to know
Departing from ISP
77% on timeTSA is currently ~14 min. Best time: 4 AM (about 5 min).
Arriving at BNA
79% on timeWhen flights into BNA are late, the average delay is 65 minutes. Build buffer if you have ground plans.
If connecting at BNA: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Southwest Airlines 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.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.