AirHint found the following cheapest return flights from Seoul (ICN) to Sofia (SOF) in January 2026 (see full year).

Return flights

21 Jan - 05 Feb	Lufthansa
21 Jan - 29 Jan	Lufthansa
09 Jan - 28 Jan	Lufthansa
18 Jan - 23 Jan	China Eastern
07 Jan - 14 Jan	China Eastern
04 Jan - 09 Jan	Etihad Airways
16 Jan - 20 Jan	Air France
02 Jan - 31 Jan	Turkish Airlines
02 Jan - 01 Feb	Turkish Airlines
05 Jan - 04 Feb	Turkish Airlines
02 Jan - 04 Feb	Turkish Airlines
14 Jan - 14 Feb	Lufthansa
05 Jan - 09 Jan	Turkish Airlines
08 Jan - 16 Jan	Emirates
08 Jan - 04 Feb	Emirates
05 Jan - 13 Jan	Emirates
01 Jan - 02 Feb	Qatar Airways
06 Jan - 04 Feb	Air France
01 Jan - 01 Feb	Turkish Airlines
12 Jan - 12 Feb	Air France

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

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 January from $629

Return flights