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

Return flights

25 Dec - 13 Jan	AirAsia	direct
25 Dec - 14 Jan	AirAsia	direct
26 Dec - 13 Jan	AirAsia	direct
26 Dec - 14 Jan	AirAsia	direct
26 Dec - 15 Jan	AirAsia	direct
31 Dec - 13 Jan	AirAsia	direct
31 Dec - 14 Jan	AirAsia	direct
31 Dec - 20 Jan	AirAsia	direct
31 Dec - 18 Jan	AirAsia	direct
24 Dec - 13 Jan	AirAsia	direct
05 Dec - 12 Dec	Royal Brunei
26 Dec - 28 Dec	Royal Brunei
25 Dec - 30 Dec	Royal Brunei
14 Dec - 15 Dec	AirAsia	direct
14 Dec - 14 Dec	AirAsia	direct
03 Dec - 15 Dec	AirAsia	direct
03 Dec - 10 Dec	AirAsia	direct
03 Dec - 03 Dec	AirAsia	direct
03 Dec - 04 Dec	AirAsia	direct
03 Dec - 14 Dec	AirAsia	direct

Also check the deals for one-way flights from Kota Kinabalu to Singapore 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 Kota Kinabalu to Singapore in December from 132€

Return flights