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

Return flights

02 Dec - 03 Dec	AirAsia X
02 Dec - 08 Dec	AirAsia X
01 Dec - 03 Dec	AirAsia X
02 Dec - 09 Dec	AirAsia X
02 Dec - 07 Dec	AirAsia X
02 Dec - 04 Dec	AirAsia X
11 Dec - 14 Dec	AirAsia X
02 Dec - 14 Dec	AirAsia X
05 Dec - 08 Dec	AirAsia X
01 Dec - 08 Dec	AirAsia X
18 Dec - 07 Jan	AirAsia	direct
19 Dec - 08 Jan	AirAsia	direct
21 Dec - 08 Jan	Jin Air	direct
20 Dec - 08 Jan	Jin Air	direct
22 Dec - 08 Jan	Jin Air	direct
22 Dec - 11 Jan	Jin Air	direct
19 Dec - 07 Jan	AirAsia	direct
22 Dec - 21 Jan	T'way Air	direct
21 Dec - 07 Jan	Jin Air	direct
21 Dec - 10 Jan	Jin Air	direct

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

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 December from 135€

Return flights