Are there nonstop flights from San Jose (SJC) to Seoul (ICN)?

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

What is the fastest connection from San Jose (SJC) to Seoul (ICN)?

via Seattle ≈ 12h 10m, via Tokyo ≈ 12h 13m, via Los Angeles ≈ 12h 54m (estimated flying time, excluding layovers).

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

Mineta San Jose International Airport (SJC) to Incheon International Airport (ICN)・9,134 km

No nonstop flights. The fastest connection is via Seattle (SEA), about 12h 10m 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.

10 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.