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

Return flights

24 Sep - 29 Sep	Air China
24 Sep - 28 Sep	Air China
24 Sep - 26 Sep	Air China
26 Sep - 28 Sep	Air China
26 Sep - 30 Sep	Air China
26 Sep - 01 Oct	Air China
22 Sep - 27 Sep	Japan Airlines
28 Sep - 14 Oct	Japan Airlines
29 Sep - 14 Oct	Japan Airlines
29 Sep - 06 Oct	Japan Airlines
29 Sep - 12 Oct	Japan Airlines
29 Sep - 13 Oct	Japan Airlines
28 Sep - 25 Oct	Japan Airlines
28 Sep - 02 Oct	Japan Airlines
23 Sep - 25 Sep	ANA
23 Sep - 30 Sep	ANA
23 Sep - 27 Sep	ANA

Also check the deals for one-way flights from Seoul 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 Seoul to Kuala Lumpur in September from 364€

Return flights