Are there nonstop flights from Seoul (ICN) to Zagreb (ZAG)?

Yes. Trinity Airways fly this route. Flight time is about 10h 26m.

What is the fastest connection from Seoul (ICN) to Zagreb (ZAG)?

via Vienna ≈ 11h 1m, via Warsaw ≈ 11h 1m, via Beijing ≈ 11h 3m (estimated flying time, excluding layovers).

from 30,000 ANA miles, from 45,000 JAL miles (economy, one way, based on the published award charts).

Incheon International Airport (ICN) to Zagreb Franjo Tuđman International Airport (ZAG)・8,445 km

Nonstop flights available (1 airline). Flight time about 10h 26m. Nonstop return flights also operate.

With milesANA 30,000 miles+ (via WAW)JAL 45,000 miles+ (via CDG)Economy, one way, estimate. Tap a connection for miles by cabin.

17 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.