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

Return flights

05 Dec - 13 Dec	Vueling Airlines
06 Dec - 08 Dec	Vueling Airlines
05 Dec - 08 Dec	Vueling Airlines
11 Dec - 17 Dec	Vueling Airlines
13 Dec - 15 Dec	Vueling Airlines
04 Dec - 08 Dec	Wizz Air UK
13 Dec - 21 Dec	Ryanair
05 Dec - 07 Dec	Vueling Airlines
06 Dec - 07 Dec	Vueling Airlines
04 Dec - 12 Dec	Wizz Air UK
14 Dec - 07 Jan	Wizz Air UK
25 Dec - 11 Jan	Vueling Airlines
16 Dec - 05 Jan	easyJet
15 Dec - 05 Jan	easyJet
25 Dec - 08 Jan	Vueling Airlines
15 Dec - 06 Jan	easyJet
26 Dec - 05 Jan	easyJet
22 Dec - 09 Jan	easyJet
13 Dec - 04 Jan	Wizz Air UK
22 Dec - 11 Jan	easyJet

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 105€

Return flights