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

Return flights

16 Sep - 14 Oct	Air China
16 Sep - 15 Oct	Air China
11 Sep - 30 Sep	Air China
16 Sep - 01 Oct	Air China
12 Sep - 30 Sep	Air China
22 Sep - 30 Sep	Air China
01 Sep - 10 Sep	China Eastern
03 Sep - 07 Sep	China Eastern
02 Sep - 07 Sep	China Eastern
28 Sep - 05 Oct	China Eastern
17 Sep - 05 Oct	China Eastern
18 Sep - 05 Oct	China Eastern
22 Sep - 02 Oct	China Eastern
17 Sep - 23 Sep	Gulf Air
27 Sep - 03 Oct	China Eastern
24 Sep - 30 Sep	Gulf Air
10 Sep - 16 Sep	Gulf Air
22 Sep - 30 Oct	Wizz Air UK
08 Sep - 09 Sep	China Eastern
28 Sep - 07 Oct	Gulf Air

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 $505

Return flights