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

Return flights

27 Sep - 01 Oct	Wizz Air UK
27 Sep - 02 Oct	Wizz Air UK
22 Sep - 01 Oct	Wizz Air
24 Sep - 01 Oct	Wizz Air
20 Sep - 23 Oct	Wizz Air UK
11 Sep - 21 Sep	Wizz Air UK
12 Sep - 17 Sep	Wizz Air
11 Sep - 18 Sep	Wizz Air UK
11 Sep - 16 Sep	Wizz Air UK
20 Sep - 24 Sep	Ryanair
09 Sep - 12 Sep	Wizz Air UK
18 Sep - 22 Sep	Ryanair
21 Sep - 12 Oct	Wizz Air UK
17 Sep - 26 Sep	Wizz Air
21 Sep - 26 Sep	Ryanair
17 Sep - 25 Sep	Wizz Air
28 Sep - 21 Oct	Wizz Air Malta
28 Sep - 09 Oct	Wizz Air UK
28 Sep - 10 Oct	Wizz Air UK
30 Sep - 07 Oct	Ryanair

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 $593

Return flights