AirHint found the following cheapest return flights from Hong Kong (HKG) to Singapore (SIN) in December 2025 (see full year).

Return flights

01 Dec - 02 Dec	Hainan Airlines
12 Dec - 14 Dec	Hainan Airlines
16 Dec - 05 Jan	Greater Bay Airlines
04 Dec - 08 Dec	AirAsia
16 Dec - 07 Jan	HK Express
04 Dec - 07 Dec	AirAsia
03 Dec - 07 Dec	AirAsia
12 Dec - 16 Dec	Royal Brunei
11 Dec - 16 Dec	Royal Brunei
03 Dec - 08 Dec	AirAsia
06 Dec - 09 Dec	AirAsia
03 Dec - 04 Dec	AirAsia
18 Dec - 03 Jan	Royal Brunei
19 Dec - 03 Jan	Royal Brunei
16 Dec - 02 Jan	Greater Bay Airlines
20 Dec - 05 Jan	China Airlines
25 Dec - 11 Jan	VietJet Air
25 Dec - 03 Jan	Royal Brunei
28 Dec - 04 Jan	China Airlines
27 Dec - 03 Jan	China Airlines

Also check the deals for one-way flights from Hong Kong 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 Hong Kong to Singapore in December from $254

Return flights