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

Return flights

18 Sep - 23 Oct	Air China
17 Sep - 15 Oct	Air China
09 Sep - 04 Oct	Air China
10 Sep - 04 Oct	Air China
23 Sep - 14 Oct	Air China
24 Sep - 29 Oct	Air China
11 Sep - 01 Oct	China Eastern
10 Sep - 03 Oct	China Eastern
09 Sep - 02 Oct	China Eastern
27 Sep - 02 Oct	China Eastern
14 Sep - 25 Sep	Gulf Air
17 Sep - 23 Sep	Gulf Air
24 Sep - 30 Sep	Gulf Air
10 Sep - 30 Sep	Gulf Air
21 Sep - 30 Sep	Gulf Air
17 Sep - 27 Sep	Gulf Air
10 Sep - 16 Sep	Gulf Air
24 Sep - 27 Sep	Gulf Air
19 Sep - 30 Sep	Gulf Air
10 Sep - 18 Sep	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 398€

Return flights