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

Return flights

31 Aug - 07 Sep	Hainan Airlines
31 Aug - 09 Sep	Hainan Airlines
30 Aug - 06 Sep	AirAsia
28 Aug - 04 Sep	China Eastern
30 Aug - 15 Sep	AirAsia
29 Aug - 07 Sep	Shenzhen Airlines
29 Aug - 08 Sep	Shenzhen Airlines
28 Aug - 14 Sep	Saudia
29 Aug - 03 Sep	China Eastern
29 Aug - 06 Sep	China Eastern
28 Aug - 31 Aug	China Eastern
30 Aug - 31 Aug	Batik Air Malaysia
29 Aug - 31 Aug	Shenzhen Airlines
28 Aug - 29 Aug	Air India
28 Aug - 31 Aug	Qantas	direct
30 Aug - 31 Aug	Singapore Airlines	direct
29 Aug - 31 Aug	Qantas	direct

Also check the deals for one-way flights from Singapore to London 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 Singapore to London in August from $846

Return flights