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

Return flights

29 Dec - 19 Jan	AirAsia	direct
29 Dec - 18 Jan	AirAsia	direct
25 Dec - 28 Dec	Royal Brunei
30 Dec - 04 Jan	Royal Brunei
29 Dec - 16 Jan	AirAsia	direct
06 Dec - 15 Dec	AirAsia	direct
06 Dec - 11 Dec	AirAsia	direct
15 Dec - 31 Dec	AirAsia	direct
15 Dec - 27 Dec	AirAsia	direct
15 Dec - 15 Dec	AirAsia	direct
25 Dec - 31 Dec	AirAsia	direct
25 Dec - 27 Dec	AirAsia	direct
17 Dec - 31 Dec	AirAsia	direct
17 Dec - 27 Dec	AirAsia	direct
15 Dec - 04 Jan	AirAsia	direct
15 Dec - 03 Jan	AirAsia	direct
15 Dec - 01 Jan	AirAsia	direct
15 Dec - 05 Jan	AirAsia	direct
25 Dec - 04 Jan	AirAsia	direct
25 Dec - 03 Jan	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 143€

Return flights