KOA (Kona) to SEA (Seattle) flights arrive on time 86% of the time. The most reliable airline on this route is Delta Air Lines at 91%. The average delay is 62 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.KOA → SEA
KOA (Kona) to SEA (Seattle)
KOA → SEA on-time performance by month
24
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26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is usually on time. About 86% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Delta Air Lines edges out Alaska Airlines on this route — 91% vs 84% on time.
Airline Comparison
Delta Air Lines leads at 91% on time; Alaska Airlines trails at 84%.
Accurate?
Good to know
Departing from KOA
86% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at SEA
81% on timeWhen flights into SEA are late, the average delay is 58 minutes. Build buffer if you have ground plans.
If connecting at SEA: TSA is ~10 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Delta Air Lines owes you — refund rights, action plan, complaint email. Free.
Flying out of KOA? 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 October 2026. Source: Bureau of Transportation Statistics.