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

Return flights

29 Aug - 04 Sep	T'way Air	direct
31 Aug - 04 Sep	T'way Air	direct
31 Aug - 05 Sep	AirAsia	direct
28 Aug - 04 Sep	T'way Air	direct
29 Aug - 03 Sep	T'way Air	direct
12 Aug - 02 Sep	AirAsia X
18 Aug - 02 Sep	AirAsia X
18 Aug - 03 Sep	AirAsia X
18 Aug - 04 Sep	AirAsia X
31 Aug - 03 Sep	AirAsia	direct
12 Aug - 25 Aug	AirAsia X
12 Aug - 29 Aug	AirAsia X
18 Aug - 25 Aug	AirAsia X
18 Aug - 29 Aug	AirAsia X
20 Aug - 24 Aug	AirAsia X
12 Aug - 27 Aug	AirAsia X
19 Aug - 24 Aug	AirAsia X
12 Aug - 20 Aug	AirAsia X
12 Aug - 22 Aug	AirAsia X
12 Aug - 21 Aug	AirAsia X

Also check the deals for one-way flights from Seoul to Kota Kinabalu in August.

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 Kota Kinabalu in August from 106€

Return flights