Are there nonstop flights from Seoul (ICN) to Kailua-Kona (KOA)?

No. The fastest connection is via Honolulu, about 9h 58m of total flying time.

What is the fastest connection from Seoul (ICN) to Kailua-Kona (KOA)?

via Honolulu ≈ 9h 58m, via Vancouver ≈ 15h 49m, via Seattle ≈ 15h 56m (estimated flying time, excluding layovers).

from 27,500 ANA miles, from 45,000 JAL miles (economy, one way, based on the published award charts).

Incheon International Airport (ICN) to Ellison Onizuka Kona International Airport at Keāhole (KOA)・7,613 km

No nonstop flights. The fastest connection is via Honolulu (HNL), about 9h 58m of flying time (layover not included).

With milesANA 27,500 miles+ (via YVR)JAL 45,000 miles+ (via SEA)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

8 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.