AirHint found the following cheapest return flights from Sofia (SOF) to Porto (OPO) in September 2026 (see full year).
Return flights
| 27 Sep - 01 Oct | Wizz Air | ||
| 24 Sep - 28 Sep | Air Serbia | ||
| 06 Sep - 10 Sep | Wizz Air | ||
| 02 Sep - 07 Sep | Wizz Air | ||
| 12 Sep - 13 Sep | Ryanair | ||
| 11 Sep - 13 Sep | Wizz Air |
Also check the deals for one-way flights from Sofia to Porto in September.
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