Are there nonstop flights from Yonago (YGJ) to Seoul (ICN)?

Yes. Air Seoul fly this route. Flight time is about 1h 16m.

Yonago → Seoul

Yonago Kitaro Airport / JASDF Miho Air Base (YGJ) to Incheon International Airport (ICN)・645 km

Nonstop flights available (1 airline). Flight time about 1h 16m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.