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

Return flights

16 Sep - 24 Sep	Lufthansa
30 Sep - 21 Oct	Lufthansa
17 Sep - 24 Sep	Lufthansa
17 Sep - 30 Sep	Lufthansa
30 Sep - 07 Oct	Lufthansa
18 Sep - 24 Sep	SWISS
17 Sep - 25 Sep	Lufthansa
17 Sep - 01 Oct	Lufthansa
18 Sep - 29 Sep	SWISS
17 Sep - 28 Sep	Lufthansa
18 Sep - 01 Oct	SWISS
30 Sep - 05 Oct	Lufthansa
18 Sep - 28 Sep	SWISS
18 Sep - 25 Sep	SWISS
30 Sep - 13 Oct	Lufthansa
23 Sep - 29 Oct	Lufthansa
23 Sep - 14 Oct	Lufthansa
23 Sep - 30 Sep	Lufthansa
22 Sep - 07 Oct	Lufthansa
22 Sep - 22 Oct	Lufthansa

Also check the deals for one-way flights from London to Singapore in September.

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 September from 530€

Return flights