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

Return flights

11 Dec - 15 Dec	Wizz Air Malta
06 Dec - 08 Dec	Air Serbia
06 Dec - 21 Dec	Ryanair
06 Dec - 16 Dec	Ryanair
08 Dec - 12 Dec	Ryanair
06 Dec - 13 Dec	Ryanair
15 Dec - 17 Dec	Ryanair
15 Dec - 18 Dec	Ryanair
10 Dec - 14 Dec	Lufthansa	direct
03 Dec - 22 Dec	Lufthansa	direct
22 Dec - 12 Jan	Ryanair
22 Dec - 13 Jan	Ryanair
22 Dec - 09 Jan	Ryanair
22 Dec - 05 Jan	Ryanair
27 Dec - 10 Jan	Ryanair
18 Dec - 07 Jan	easyJet
27 Dec - 09 Jan	Ryanair
22 Dec - 02 Jan	Ryanair
29 Dec - 13 Jan	Austrian Airlines
24 Dec - 13 Jan	Austrian Airlines

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 $149

Return flights