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

Return flights

17 Sep - 23 Sep	KLM
22 Sep - 29 Oct	KLM
08 Sep - 23 Sep	KLM
17 Sep - 05 Oct	KLM
17 Sep - 30 Sep	KLM
21 Sep - 30 Sep	KLM
14 Sep - 25 Sep	KLM
26 Sep - 06 Oct	KLM
17 Sep - 07 Oct	KLM
17 Sep - 25 Sep	KLM
03 Sep - 21 Sep	KLM
02 Sep - 21 Sep	KLM
15 Sep - 22 Sep	KLM
09 Sep - 16 Sep	SWISS
10 Sep - 06 Oct	KLM
22 Sep - 05 Oct	KLM
26 Sep - 29 Oct	KLM
02 Sep - 02 Oct	KLM
29 Sep - 06 Oct	KLM
24 Sep - 16 Oct	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 $770

Return flights