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

Return flights

14 Dec - 10 Jan	Ryanair
07 Dec - 12 Dec	Wizz Air Malta
15 Dec - 18 Dec	Eurowings
12 Dec - 10 Jan	Ryanair
17 Dec - 28 Dec	Austrian Airlines
11 Dec - 14 Dec	Ryanair
04 Dec - 07 Dec	Eurowings
11 Dec - 11 Jan	Ryanair
03 Dec - 06 Dec	Eurowings
18 Dec - 28 Dec	Ryanair
19 Dec - 05 Jan	Eurowings
28 Dec - 03 Jan	Austrian Airlines
20 Dec - 26 Dec	Eurowings
19 Dec - 28 Dec	Eurowings
20 Dec - 23 Dec	Ryanair
29 Dec - 03 Jan	Austrian Airlines
18 Dec - 04 Jan	Lufthansa
27 Dec - 04 Jan	Ryanair
20 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Cologne 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 Cologne to Belgrade in December from $209

Return flights