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

Return flights

04 Dec - 06 Dec	AirAsia X
01 Dec - 03 Dec	AirAsia X
02 Dec - 06 Dec	AirAsia X
01 Dec - 06 Dec	AirAsia X
05 Dec - 06 Dec	AirAsia X
03 Dec - 06 Dec	AirAsia X
02 Dec - 18 Dec	AirAsia X
04 Dec - 19 Dec	AirAsia X
01 Dec - 04 Dec	AirAsia X
08 Dec - 15 Dec	AirAsia X
22 Dec - 02 Jan	T'way Air	direct
22 Dec - 09 Jan	Jeju Air	direct
29 Dec - 05 Jan	AirAsia
29 Dec - 07 Jan	Jin Air	direct
29 Dec - 02 Jan	AirAsia	direct
29 Dec - 03 Jan	Jin Air	direct
20 Dec - 03 Jan	Jin Air	direct
19 Dec - 30 Jan	T'way Air	direct
29 Dec - 04 Jan	AirAsia	direct
29 Dec - 05 Jan	Jeju 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 141€

Return flights