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

Return flights

17 Dec - 24 Dec	Lufthansa	direct
12 Dec - 14 Dec	Lufthansa	direct
19 Dec - 15 Jan	Air Serbia	direct
18 Dec - 11 Jan	Lufthansa
18 Dec - 11 Jan	Air Serbia	direct
28 Dec - 04 Jan	SWISS
24 Dec - 04 Jan	Air Serbia	direct
30 Dec - 02 Jan	Air Serbia	direct

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Belgrade in December from 146€

Return flights