AirHint found the following cheapest return flights from Kota Kinabalu (BKI) to Seoul (ICN) in September 2025 (see full year).

Return flights

25 Sep - 10 Oct	AirAsia
25 Sep - 13 Oct	AirAsia
25 Sep - 14 Oct	AirAsia
21 Sep - 10 Oct	AirAsia
25 Sep - 11 Oct	AirAsia
21 Sep - 11 Oct	AirAsia
25 Sep - 13 Oct	AirAsia	direct
25 Sep - 14 Oct	AirAsia	direct
25 Sep - 16 Oct	AirAsia	direct
25 Sep - 15 Oct	AirAsia	direct
21 Sep - 23 Sep	AirAsia
21 Sep - 24 Sep	AirAsia
25 Sep - 27 Sep	AirAsia	direct
25 Sep - 28 Sep	AirAsia	direct
21 Sep - 27 Sep	AirAsia	direct
21 Sep - 28 Sep	AirAsia	direct
21 Sep - 23 Sep	AirAsia	direct
17 Sep - 23 Sep	AirAsia
17 Sep - 24 Sep	AirAsia
21 Sep - 25 Sep	AirAsia	direct

Also check the deals for one-way flights from Kota Kinabalu to Seoul 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 Kota Kinabalu to Seoul in September from $148

Return flights