AirHint found the following cheapest return flights from Sofia (SOF) to Bucharest (OTP) in August 2025 (see full year).

Return flights

28 Aug - 01 Sep	Ryanair
01 Aug - 03 Aug	Air Serbia
30 Aug - 04 Sep	Wizz Air
09 Aug - 15 Aug	Air Serbia
11 Aug - 18 Aug	Air Serbia
19 Aug - 05 Sep	Ryanair
23 Aug - 24 Aug	Turkish Airlines
06 Aug - 08 Aug	Turkish Airlines
06 Aug - 13 Aug	Turkish Airlines
09 Aug - 14 Aug	Turkish Airlines
19 Aug - 22 Aug	Turkish Airlines
15 Aug - 16 Aug	Turkish Airlines
22 Aug - 23 Aug	Turkish Airlines

Also check the deals for one-way flights from Sofia to Bucharest in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Sofia to Bucharest in August from 147€

Return flights