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

Return flights

22 Dec - 26 Dec	Air Serbia	direct
13 Dec - 14 Dec	Air Serbia	direct
12 Dec - 14 Dec	Air Serbia	direct
15 Dec - 16 Dec	Air Serbia
08 Dec - 16 Dec	Air Serbia
08 Dec - 15 Dec	Air Serbia
31 Dec - 02 Jan	Air Serbia	direct
10 Dec - 13 Dec	Wizz Air
08 Dec - 15 Dec	Air Serbia	direct
19 Dec - 23 Dec	Air Serbia
30 Dec - 03 Jan	Air Serbia	direct
29 Dec - 02 Jan	Air Serbia	direct
17 Dec - 18 Dec	Wizz Air
28 Dec - 01 Jan	Air Serbia	direct
28 Dec - 02 Jan	Air Serbia	direct
28 Dec - 03 Jan	Air Serbia	direct

Also check the deals for one-way flights from Sofia to Belgrade 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 Sofia to Belgrade in December from 143€

Return flights