AirHint found the following cheapest return flights from Seoul (ICN) to Sofia (SOF) in January 2026 (see full year).
Return flights
| 30 Jan - 08 Feb | KLM | ||
| 21 Jan - 05 Feb | Lufthansa | ||
| 18 Jan - 18 Feb | Lufthansa | ||
| 14 Jan - 14 Feb | Lufthansa | ||
| 12 Jan - 12 Feb | Air France |
Also check the deals for one-way flights from Seoul to Sofia in January.
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