AirHint found the following cheapest return flights from Hong Kong (HKG) to Phnom-penh (PNH) in December 2025 (see full year).

Return flights

12 Dec - 16 Dec	Thai AirAsia
13 Dec - 16 Dec	HK Express
06 Dec - 16 Dec	Thai AirAsia
05 Dec - 16 Dec	Thai AirAsia
06 Dec - 11 Dec	Thai AirAsia
05 Dec - 11 Dec	Thai AirAsia
13 Dec - 16 Dec	Cathay Pacific	direct
12 Dec - 16 Dec	Cathay Pacific	direct
29 Dec - 08 Jan	Thai AirAsia
29 Dec - 09 Jan	Thai AirAsia
12 Dec - 30 Dec	Thai AirAsia
25 Dec - 08 Jan	Thai AirAsia
25 Dec - 09 Jan	Thai AirAsia
26 Dec - 08 Jan	Thai AirAsia
26 Dec - 09 Jan	Thai AirAsia
29 Dec - 07 Jan	Thai AirAsia
25 Dec - 07 Jan	Thai AirAsia
26 Dec - 07 Jan	Thai AirAsia
13 Dec - 30 Dec	Thai AirAsia

Also check the deals for one-way flights from Hong Kong to Phnom-penh 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 Phnom-penh in December from $263

Return flights