Are there nonstop flights from Pasco (PSC) to Seoul (ICN)?

No. The fastest connection is via Seattle, about 11h 10m of total flying time.

What is the fastest connection from Pasco (PSC) to Seoul (ICN)?

via Seattle ≈ 11h 10m, via San Francisco ≈ 12h 51m, via Salt Lake City ≈ 13h 8m (estimated flying time, excluding layovers).

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

Tri Cities Airport (PSC) to Incheon International Airport (ICN)・8,643 km

No nonstop flights. The fastest connection is via Seattle (SEA), about 11h 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.

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.