AirHint found the following cheapest return flights from Sofia (SOF) to Bucharest (OTP) in September 2026 (see full year).
Return flights
| 16 Sep - 23 Sep | Wizz Air | ||
| 10 Sep - 17 Sep | Wizz Air | ||
| 11 Sep - 18 Sep | Air Serbia | ||
| 13 Sep - 20 Sep | Wizz Air | ||
| 14 Sep - 21 Sep | Wizz Air | ||
| 11 Sep - 18 Sep | TAROM | direct | |
| 14 Sep - 21 Sep | TAROM | direct |
Also check the deals for one-way flights from Sofia to Bucharest in September.
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