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

Return flights

27 Sep - 28 Oct	Wizz Air UK
20 Sep - 29 Oct	Wizz Air UK
22 Sep - 12 Oct	Wizz Air UK
24 Sep - 12 Oct	Wizz Air UK
29 Sep - 09 Oct	Wizz Air Malta
03 Sep - 11 Sep	Wizz Air UK
24 Sep - 09 Oct	Wizz Air UK
17 Sep - 08 Oct	Wizz Air UK
27 Sep - 07 Oct	Wizz Air UK
29 Sep - 07 Oct	Wizz Air Malta
10 Sep - 05 Oct	Wizz Air UK
10 Sep - 14 Sep	Wizz Air UK
06 Sep - 11 Sep	Wizz Air UK
03 Sep - 07 Sep	Wizz Air UK
09 Sep - 14 Sep	Wizz Air UK
17 Sep - 25 Sep	Wizz Air UK
22 Sep - 29 Sep	Wizz Air UK
03 Sep - 24 Sep	Wizz Air UK
06 Sep - 22 Sep	Wizz Air UK
08 Sep - 14 Sep	Hainan Airlines

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 390€

Return flights