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

Return flights

12 Sep - 22 Sep	Pegasus Airlines
06 Sep - 12 Sep	Pegasus Airlines
12 Sep - 26 Sep	Pegasus Airlines
08 Sep - 22 Sep	Pegasus Airlines
14 Sep - 22 Sep	Pegasus Airlines
10 Sep - 15 Sep	Pegasus Airlines
10 Sep - 26 Sep	Pegasus Airlines
29 Sep - 16 Oct	Ryanair
28 Sep - 20 Oct	Ryanair
08 Sep - 19 Sep	Pegasus Airlines
15 Sep - 22 Sep	Pegasus Airlines
08 Sep - 12 Sep	Pegasus Airlines
28 Sep - 10 Oct	Ryanair
28 Sep - 13 Oct	Ryanair
22 Sep - 06 Oct	Ryanair
21 Sep - 06 Oct	Pegasus Airlines
24 Sep - 10 Oct	Ryanair
27 Sep - 04 Oct	Pegasus Airlines
28 Sep - 06 Oct	Pegasus Airlines
27 Sep - 10 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 489€

Return flights