Are there nonstop flights from Seoul (ICN) to Santa Rosa (STS)?

No. The fastest connection is via San Francisco, about 11h 48m of total flying time.

What is the fastest connection from Seoul (ICN) to Santa Rosa (STS)?

via San Francisco ≈ 11h 48m, via Seattle ≈ 12h 1m, via Los Angeles ≈ 13h 4m (estimated flying time, excluding layovers).

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

Incheon International Airport (ICN) to Charles M. Schulz Sonoma County Airport (STS)・8,991 km

No nonstop flights. The fastest connection is via San Francisco (SFO), about 11h 48m of flying time (layover not included).

With milesJAL 37,000 miles+ (via SEA)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

6 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.