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

Return flights

12 Aug - 16 Sep	Scandinavian Airlines
19 Aug - 09 Sep	Scandinavian Airlines
29 Aug - 05 Sep	Lufthansa
28 Aug - 08 Sep	SWISS
30 Aug - 06 Sep	Lufthansa
30 Aug - 03 Sep	Lufthansa
15 Aug - 18 Sep	Lufthansa
15 Aug - 09 Sep	Lufthansa
28 Aug - 11 Sep	SWISS
24 Aug - 27 Aug	Lufthansa
27 Aug - 02 Sep	Lufthansa
25 Aug - 28 Aug	Lufthansa
13 Aug - 20 Aug	Lufthansa
12 Aug - 20 Aug	Lufthansa
20 Aug - 27 Aug	Lufthansa
21 Aug - 27 Aug	Lufthansa
19 Aug - 22 Aug	Lufthansa
24 Aug - 28 Aug	Lufthansa
12 Aug - 19 Aug	Lufthansa
08 Aug - 12 Aug	Lufthansa

Also check the deals for one-way flights from London to Belgrade in August.

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 August from $220

Return flights