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

Return flights

06 Dec - 13 Dec	Wizz Air
13 Dec - 28 Dec	Wizz Air
06 Dec - 07 Dec	Wizz Air
12 Dec - 14 Dec	Ryanair
19 Dec - 21 Dec	Ryanair
20 Dec - 20 Dec	Air Serbia
06 Dec - 08 Dec	Air Serbia	direct
16 Dec - 18 Dec	Air Serbia	direct
06 Dec - 13 Dec	Air Serbia	direct
12 Dec - 14 Dec	Air Serbia	direct
30 Dec - 01 Jan	Air Serbia	direct
31 Dec - 03 Jan	Air Serbia	direct
29 Dec - 02 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 $111

Return flights