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

Return flights

22 Sep - 12 Oct	Wizz Air UK
23 Sep - 08 Oct	Ryanair
23 Sep - 12 Oct	easyJet
10 Sep - 25 Sep	Ryanair
10 Sep - 30 Sep	Ryanair
17 Sep - 15 Oct	easyJet
24 Sep - 17 Oct	easyJet
11 Sep - 18 Sep	Ryanair
23 Sep - 20 Oct	Ryanair
24 Sep - 30 Sep	Ryanair
25 Sep - 30 Sep	Ryanair
25 Sep - 02 Oct	Ryanair
16 Sep - 30 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
30 Sep - 22 Oct	easyJet
30 Sep - 12 Oct	easyJet
25 Sep - 28 Sep	Ryanair
24 Sep - 03 Oct	easyJet
10 Sep - 18 Sep	easyJet

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 594€

Return flights