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

Return flights

06 Dec - 08 Dec	KLM
09 Dec - 12 Dec	SWISS
30 Dec - 08 Jan	Lufthansa
08 Dec - 10 Dec	KLM
29 Dec - 02 Jan	Lufthansa
05 Dec - 07 Dec	Lufthansa
30 Dec - 31 Dec	KLM
26 Dec - 31 Dec	Lufthansa
27 Dec - 15 Jan	SWISS
27 Dec - 07 Jan	SWISS
27 Dec - 08 Jan	SWISS
31 Dec - 01 Jan	KLM
27 Dec - 02 Jan	SWISS
29 Dec - 30 Dec	KLM
20 Dec - 06 Jan	KLM
21 Dec - 10 Jan	SWISS
28 Dec - 03 Jan	ITA Airways
24 Dec - 27 Dec	ITA Airways
26 Dec - 27 Dec	SWISS
22 Dec - 27 Dec	ITA Airways

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.

Book a cheap hotel in Belgrade

Cheap car rent in Belgrade

Cheapest return flights from London to Belgrade in December from 227€

Return flights