AirHint found the following cheapest return flights from London (LCY) to Kuala Lumpur (KUL) in September 2025 (see full year).

Return flights

15 Sep - 13 Oct	KLM
09 Sep - 18 Sep	KLM
21 Sep - 16 Oct	KLM
16 Sep - 16 Oct	KLM
15 Sep - 14 Oct	KLM
23 Sep - 30 Sep	SWISS
15 Sep - 23 Sep	KLM
16 Sep - 01 Oct	SWISS
24 Sep - 08 Oct	SWISS
16 Sep - 21 Sep	SWISS
21 Sep - 21 Oct	KLM
26 Sep - 13 Oct	KLM
15 Sep - 30 Sep	KLM
15 Sep - 20 Oct	KLM
24 Sep - 21 Oct	KLM
09 Sep - 30 Sep	KLM
17 Sep - 29 Sep	SWISS
07 Sep - 18 Sep	KLM
10 Sep - 23 Sep	KLM
08 Sep - 18 Sep	KLM

Also check the deals for one-way flights from London to Kuala Lumpur 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 Kuala Lumpur in September from 589€

Return flights