AirHint found the following cheapest return flights from Seoul (ICN) to Sofia (SOF) in August 2025 (see full year).

Return flights

22 Aug - 30 Aug	T'way Air
04 Aug - 11 Aug	Air France
18 Aug - 25 Aug	SWISS
20 Aug - 24 Aug	Turkish Airlines
19 Aug - 24 Aug	Emirates
19 Aug - 26 Aug	Turkish Airlines
27 Aug - 31 Aug	Emirates
23 Aug - 27 Aug	Emirates
18 Aug - 19 Aug	Lufthansa
04 Aug - 07 Aug	Qatar Airways

Also check the deals for one-way flights from Seoul to Sofia in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Seoul to Sofia in August from 632€

Return flights