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

Return flights

02 Dec - 04 Dec	Wizz Air Malta
11 Dec - 14 Dec	Wizz Air Malta
17 Dec - 22 Dec	Wizz Air Malta
12 Dec - 15 Dec	Wizz Air Malta
12 Dec - 15 Dec	TAROM	direct
02 Dec - 04 Dec	TAROM	direct
02 Dec - 03 Dec	Wizz Air Malta
27 Dec - 03 Jan	Wizz Air Malta
17 Dec - 22 Dec	TAROM	direct
02 Dec - 03 Dec	TAROM	direct
19 Dec - 20 Dec	Wizz Air Malta
31 Dec - 03 Jan	Ryanair

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

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 Bucharest to Sofia in December from $85

Return flights