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

Return flights

31 Dec - 15 Jan	Eurowings
30 Dec - 08 Jan	SWISS
16 Dec - 19 Dec	LOT
16 Dec - 24 Dec	LOT
16 Dec - 22 Dec	LOT
27 Dec - 31 Dec	LOT
25 Dec - 31 Dec	LOT
10 Dec - 17 Dec	LOT
28 Dec - 31 Dec	LOT
09 Dec - 12 Dec	LOT
10 Dec - 21 Dec	LOT
09 Dec - 16 Dec	LOT
31 Dec - 09 Jan	SWISS
30 Dec - 09 Jan	SWISS
30 Dec - 06 Jan	SWISS
26 Dec - 08 Jan	SWISS
31 Dec - 06 Jan	SWISS
16 Dec - 12 Jan	LOT
29 Dec - 07 Jan	LOT
31 Dec - 11 Jan	KLM

Also check the deals for one-way flights from London 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 London to Belgrade in December from 205€

Return flights