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

Return flights

31 Aug - 30 Sep	Shenzhen Airlines
30 Aug - 30 Sep	Lufthansa
28 Aug - 25 Sep	Etihad Airways
28 Aug - 22 Sep	Etihad Airways
27 Aug - 22 Sep	Etihad Airways
29 Aug - 07 Sep	Hainan Airlines
27 Aug - 11 Sep	Hainan Airlines
27 Aug - 18 Sep	Hainan Airlines
30 Aug - 15 Sep	Lufthansa
27 Aug - 17 Sep	SWISS
22 Aug - 27 Aug	Hainan Airlines
22 Aug - 26 Aug	Hainan Airlines
20 Aug - 27 Aug	Hainan Airlines
20 Aug - 26 Aug	Hainan Airlines
13 Aug - 20 Aug	Air India
13 Aug - 19 Aug	Air India
12 Aug - 20 Aug	Aegean Airlines
15 Aug - 20 Aug	Air India
14 Aug - 17 Aug	Air India
15 Aug - 19 Aug	Air India

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 434€

Return flights