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

Return flights

11 Sep - 15 Sep	China Southern
04 Sep - 11 Sep	China Southern
03 Sep - 06 Sep	China Southern
01 Sep - 13 Sep	China Southern
04 Sep - 10 Sep	China Southern
09 Sep - 12 Sep	China Southern
15 Sep - 22 Sep	China Southern
18 Sep - 21 Sep	China Southern
16 Sep - 24 Sep	China Southern
09 Sep - 26 Sep	AirAsia X
28 Sep - 03 Oct	Air China
29 Sep - 07 Oct	AirAsia X
29 Sep - 11 Oct	AirAsia X
29 Sep - 08 Oct	AirAsia X
29 Sep - 12 Oct	AirAsia X
29 Sep - 17 Oct	AirAsia X
29 Sep - 03 Oct	AirAsia X
29 Sep - 20 Oct	AirAsia X
28 Sep - 07 Oct	AirAsia X
28 Sep - 11 Oct	AirAsia X

Also check the deals for one-way flights from Osaka to Phnom-penh in September.

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 September from $284

Return flights