AirHint found the following cheapest return flights from Oslo (OSL) to Sofia (SOF) in April 2026 (see full year).
Return flights
| 01 Apr - 24 Apr | LOT | ||
| 28 Apr - 02 May | Ryanair | ||
| 04 Apr - 11 Apr | Air Serbia | ||
| 01 Apr - 04 Apr | LOT | ||
| 01 Apr - 08 Apr | Ryanair | ||
| 30 Apr - 03 May | Ryanair | ||
| 01 Apr - 05 Apr | LOT | ||
| 02 Apr - 05 Apr | Air Serbia |
Also check the deals for one-way flights from Oslo to Sofia in April.
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