AirHint found the following cheapest return flights from Zagreb (ZAG) to Sofia (SOF) in January 2026 (see full year).
Return flights
| 09 Jan - 11 Jan | Ryanair | ||
| 15 Jan - 18 Jan | Air Serbia | ||
| 01 Jan - 08 Jan | Ryanair | ||
| 01 Jan - 04 Jan | Ryanair | ||
| 02 Jan - 06 Jan | Air Serbia |
Also check the deals for one-way flights from Zagreb to Sofia in January.
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