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

Return flights

08 Aug - 11 Aug	Air Cambodia	direct
16 Aug - 06 Sep	Cambodia Airways
25 Aug - 28 Aug	Vietnam Airlines
03 Aug - 16 Aug	HK Express
13 Aug - 19 Aug	HK Express
22 Aug - 24 Aug	Malaysia Airlines
13 Aug - 19 Aug	Cathay Pacific	direct
07 Aug - 13 Aug	Cathay Pacific	direct
25 Aug - 28 Aug	Cathay Pacific	direct
08 Aug - 13 Aug	Cathay Pacific	direct
03 Aug - 16 Aug	Cathay Pacific	direct
16 Aug - 06 Sep	Cathay Pacific	direct

Also check the deals for one-way flights from Hong Kong to Phnom-penh in August.

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 August from $200

Return flights