AirHint found the following cheapest return flights from London (LCY) to Singapore (SIN) in September 2026 (see full year).

Return flights

13 Sep - 15 Oct	SWISS
13 Sep - 27 Sep	SWISS
04 Sep - 20 Sep	SWISS
13 Sep - 20 Sep	SWISS
17 Sep - 27 Sep	SWISS
13 Sep - 30 Sep	SWISS
07 Sep - 20 Sep	SWISS
01 Sep - 29 Sep	SWISS
13 Sep - 05 Oct	SWISS
23 Sep - 12 Oct	SWISS
01 Sep - 13 Sep	SWISS
06 Sep - 13 Sep	SWISS
04 Sep - 13 Sep	SWISS
24 Sep - 01 Oct	SWISS
17 Sep - 02 Oct	SWISS
28 Sep - 05 Oct	SWISS
25 Sep - 02 Oct	KLM
26 Sep - 16 Oct	KLM

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 $740

Return flights