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

Return flights

13 Dec - 16 Dec	Wizz Air
11 Dec - 15 Dec	Air Serbia
11 Dec - 12 Dec	Air Serbia	direct
11 Dec - 13 Dec	Air Serbia	direct
07 Dec - 14 Dec	Wizz Air
21 Dec - 22 Dec	Wizz Air
12 Dec - 14 Dec	Air Serbia
12 Dec - 14 Dec	Air Serbia	direct
25 Dec - 31 Dec	Wizz Air
03 Dec - 06 Dec	Air Serbia	direct
31 Dec - 03 Jan	Air Serbia	direct
30 Dec - 02 Jan	Air Serbia
31 Dec - 02 Jan	Air Serbia
30 Dec - 02 Jan	Air Serbia	direct
31 Dec - 02 Jan	Air Serbia	direct
29 Dec - 02 Jan	Air Serbia
29 Dec - 02 Jan	Air Serbia	direct

Also check the deals for one-way flights from Belgrade 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 Belgrade to Sofia in December from $118

Return flights