AirHint found the following cheapest one-way flights from Bucharest (OTP) to Sofia (SOF) in September 2026 (see full year).
One-Way flights
| 23 Sep | Ryanair | ||
| 30 Sep | Wizz Air Malta | ||
| 19 Sep | Wizz Air Malta | ||
| 16 Sep | Wizz Air Malta | ||
| 24 Sep | Ryanair | ||
| 15 Sep | Ryanair | ||
| 26 Sep | Wizz Air Malta | ||
| 02 Sep | Wizz Air Malta | ||
| 18 Sep | Ryanair | ||
| 21 Sep | Ryanair |
Also check the deals for return flights from Bucharest to Sofia in September.
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