Are there nonstop flights from Seoul (ICN) to Kos (KGS)?

No. The fastest connection is via Warsaw, about 12h 10m of total flying time.

What is the fastest connection from Seoul (ICN) to Kos (KGS)?

via Warsaw ≈ 12h 10m, via Helsinki ≈ 12h 21m, via Vienna ≈ 12h 30m (estimated flying time, excluding layovers).

from 30,000 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Incheon International Airport (ICN) to Kos International Airport "Ippokratis" (KGS)・8,325 km

No nonstop flights. The fastest connection is via Warsaw (WAW), about 12h 10m of flying time (layover not included).

With milesANA 30,000 miles+ (via WAW)JAL 37,000 miles+ (via HEL)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

13 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.