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

Return flights

18 Sep - 22 Sep	Pegasus Airlines
29 Sep - 06 Oct	Ryanair
16 Sep - 23 Sep	Ryanair
08 Sep - 17 Sep	Ryanair
03 Sep - 16 Sep	Ryanair
08 Sep - 16 Oct	Ryanair
08 Sep - 19 Sep	Ryanair
18 Sep - 25 Sep	Ryanair
04 Sep - 21 Sep	Ryanair
07 Sep - 16 Sep	Ryanair
01 Sep - 23 Sep	Ryanair
01 Sep - 22 Sep	Ryanair
22 Sep - 06 Oct	Ryanair
24 Sep - 08 Oct	Ryanair
22 Sep - 14 Oct	Ryanair
29 Sep - 02 Oct	Ryanair
22 Sep - 02 Oct	Ryanair
10 Sep - 15 Oct	Ryanair
17 Sep - 12 Oct	Ryanair
24 Sep - 01 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 $673

Return flights