The cheapest flight to Sofia you can get by boooking 12 days before departure.
The most popular airlines on the route Seoul - Sofia: Aeroflot (SU).
The cheapest flights you can book on the route Incheon (ICN) - Sofia Airport (SOF).
There is no direct flight on the route from Seoul to Sofia
Il volo con scalo più breve dura 14h 40min.