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

Return flights

20 Dec - 26 Dec	Aegean Airlines	direct
31 Dec - 04 Jan	Aegean Airlines	direct
12 Dec - 15 Dec	Aegean Airlines
13 Dec - 15 Dec	Air Serbia
12 Dec - 14 Dec	Aegean Airlines
19 Dec - 22 Dec	Aegean Airlines	direct
20 Dec - 21 Dec	Aegean Airlines	direct
05 Dec - 08 Dec	Air Serbia
04 Dec - 07 Dec	Air Serbia	direct
26 Dec - 28 Dec	Aegean Airlines	direct
03 Dec - 09 Dec	Air Serbia	direct
28 Dec - 02 Jan	Aegean Airlines	direct

Also check the deals for one-way flights from Athens 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 Athens to Belgrade in December from $176

Return flights