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

Return flights

16 Dec - 13 Jan	Ryanair
13 Dec - 19 Dec	Ryanair
26 Dec - 10 Jan	Ryanair
08 Dec - 13 Dec	Ryanair
15 Dec - 13 Jan	Ryanair
06 Dec - 07 Dec	Ryanair
12 Dec - 17 Dec	Ryanair
19 Dec - 09 Jan	Ryanair
11 Dec - 15 Dec	Ryanair
12 Dec - 14 Dec	Ryanair
05 Dec - 07 Dec	Ryanair
11 Dec - 14 Dec	Ryanair
01 Dec - 03 Dec	Ryanair
27 Dec - 08 Jan	Ryanair
05 Dec - 08 Dec	Ryanair
27 Dec - 09 Jan	Ryanair
29 Dec - 09 Jan	Ryanair
31 Dec - 16 Jan	Pegasus Airlines
19 Dec - 11 Jan	Ryanair
29 Dec - 07 Jan	Ryanair

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 $108

Return flights