AirHint found the following cheapest return flights from London (LCY) to Singapore (SIN) in August 2025 (see full year).

Return flights

29 Aug - 29 Sep	KLM
25 Aug - 21 Sep	SWISS
25 Aug - 08 Sep	SWISS
26 Aug - 22 Sep	SWISS
25 Aug - 16 Sep	SWISS
26 Aug - 16 Sep	SWISS
19 Aug - 16 Sep	SWISS
25 Aug - 10 Sep	SWISS
27 Aug - 10 Sep	SWISS
28 Aug - 14 Sep	SWISS
06 Aug - 10 Aug	KLM
27 Aug - 31 Aug	SWISS
25 Aug - 31 Aug	SWISS
13 Aug - 20 Aug	SWISS
20 Aug - 31 Aug	SWISS
20 Aug - 25 Aug	SWISS
20 Aug - 27 Aug	SWISS
19 Aug - 25 Aug	SWISS
21 Aug - 28 Aug	SWISS
19 Aug - 28 Aug	SWISS

Also check the deals for one-way flights from London to Singapore 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 Singapore in August from $800

Return flights