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

Return flights

30 Sep - 07 Oct	Turkish Airlines
24 Sep - 01 Oct	Etihad Airways
16 Sep - 23 Sep	Turkish Airlines
23 Sep - 30 Sep	Turkish Airlines
29 Sep - 06 Oct	Gulf Air
09 Sep - 16 Sep	Air China
28 Sep - 05 Oct	Turkish Airlines
25 Sep - 02 Oct	Turkish Airlines
18 Sep - 25 Sep	Turkish Airlines
27 Sep - 04 Oct	Gulf Air
07 Sep - 14 Sep	China Eastern
22 Sep - 29 Sep	Qatar Airways
25 Sep - 29 Oct	Gulf Air
25 Sep - 05 Oct	Gulf Air
07 Sep - 10 Sep	China Eastern
25 Sep - 28 Sep	Gulf Air
10 Sep - 20 Sep	China Eastern
26 Sep - 02 Oct	Turkish Airlines
16 Sep - 19 Sep	Gulf Air
10 Sep - 01 Oct	IndiGo

Also check the deals for one-way flights from Singapore to London 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 Singapore to London in September from $611

Return flights