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

Return flights

29 Dec - 15 Jan	HiSky Europe
25 Dec - 01 Jan	Air Serbia
26 Dec - 29 Dec	Ryanair
26 Dec - 30 Dec	Wizz Air Malta
30 Dec - 06 Jan	HiSky Europe
30 Dec - 02 Jan	Wizz Air UK
29 Dec - 01 Jan	HiSky Europe
27 Dec - 03 Jan	Wizz Air Malta
25 Dec - 28 Dec	Air Serbia
28 Dec - 30 Dec	Wizz Air Malta
26 Dec - 29 Dec	TAROM	direct
23 Dec - 26 Dec	TAROM	direct
28 Dec - 30 Dec	TAROM	direct
26 Dec - 30 Dec	TAROM	direct
26 Dec - 27 Dec	Wizz Air Malta
30 Dec - 04 Jan	HiSky Europe
22 Dec - 29 Dec	Ryanair
28 Dec - 04 Jan	Wizz Air Malta
30 Dec - 06 Jan	TAROM	direct
28 Dec - 04 Jan	TAROM	direct

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 136€

Return flights