If interested you may find very limited travel options within June 2015. .Max stay in South Korea 1 month. All these European cities are easy to reach either by bus or low cost airlines. To check your connection possibilities from your home town directly you may check through Skyscanner. Cheap accommodation in South Korea is possible to compare and book here.
Booking samples
Munich - Seoul from €383
Frankfurt - Seoul from €392
Budapest - Seoul for €383
Geneva - Seoul from €392
London - Seoul from £279
Vienna - Seoul for €414
Brussels/Amsterdam - Seoul from €389
Travel date samples
5. - 15.6.
7. - 15.6.
14. - 22.6.
14. - 26.6.
This is fare four a return ticket including all taxes and fees as well as checked in luggage up to 23kgs. Only few travel dates are available for such a cheap fare so you better hurry up with booking if you are interested in this great deal.
Booking sample of cheap return flights to Seoul, South Korea from Europe for €383 here. In this case you would be flying from Munich to Seoul on 7th of June and returning from Asia back to Germany on 22nd of June 2015.