AirHint found the following cheapest return flights from Frankfurt (FRA) to Sofia (SOF) in April 2026 (see full year).
Return flights
| 10 Apr - 26 Apr | Lufthansa | direct | |
| 26 Apr - 15 May | Lufthansa | direct | |
| 03 Apr - 06 Apr | Air Serbia | ||
| 11 Apr - 20 Apr | Air Serbia |
Also check the deals for one-way flights from Frankfurt to Sofia in April.
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