AirHint found the following cheapest return flights from Seoul (ICN) to Sofia (SOF) in April 2026 (see full year).
Return flights
| 15 Apr - 20 Apr | SWISS | ||
| 08 Apr - 22 Apr | Lufthansa | ||
| 22 Apr - 06 May | Lufthansa | ||
| 16 Apr - 24 Apr | Lufthansa | ||
| 20 Apr - 27 Apr | Lufthansa | ||
| 30 Apr - 05 May | Lufthansa | ||
| 19 Apr - 24 Apr | KLM | ||
| 05 Apr - 10 Apr | Emirates |
Also check the deals for one-way flights from Seoul to Sofia in April.
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