Are there nonstop flights from Seoul (ICN) to Valencia (VLC)?

No. The fastest connection is via Munich, about 12h 38m of total flying time.

What is the fastest connection from Seoul (ICN) to Valencia (VLC)?

via Munich ≈ 12h 38m, via Wrocław ≈ 12h 38m, via Prague ≈ 12h 38m (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 Valencia Airport (VLC)・9,888 km

No nonstop flights. The fastest connection is via Munich (MUC), about 12h 38m of flying time (layover not included).

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

None.

20 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.