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

Return flights

28 Aug - 31 Aug	China Southern
30 Aug - 02 Sep	China Southern
30 Aug - 07 Sep	China Southern
28 Aug - 04 Sep	China Southern
20 Aug - 25 Aug	AirAsia X
24 Aug - 25 Aug	AirAsia X
19 Aug - 25 Aug	AirAsia X
20 Aug - 22 Aug	AirAsia X
19 Aug - 22 Aug	AirAsia X
17 Aug - 25 Aug	AirAsia X
17 Aug - 22 Aug	AirAsia X
01 Aug - 27 Aug	China Southern
01 Aug - 28 Aug	China Southern
17 Aug - 05 Sep	China Southern
26 Aug - 01 Sep	China Southern
11 Aug - 06 Sep	China Southern
31 Aug - 19 Sep	AirAsia X
31 Aug - 09 Sep	AirAsia X
31 Aug - 10 Sep	AirAsia X
31 Aug - 13 Sep	AirAsia X

Also check the deals for one-way flights from Osaka 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 Osaka to Phnom-penh in August from $284

Return flights