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	AirAsia X
09 Sep - 15 Sep	AirAsia X
08 Sep - 15 Sep	AirAsia X
09 Sep - 10 Sep	AirAsia X
08 Sep - 10 Sep	AirAsia X
11 Sep - 12 Sep	AirAsia X
11 Sep - 28 Sep	AirAsia X
11 Sep - 14 Sep	AirAsia X
09 Sep - 12 Sep	AirAsia X
09 Sep - 28 Sep	AirAsia X
29 Sep - 04 Oct	AirAsia X
29 Sep - 03 Oct	AirAsia X
16 Sep - 04 Oct	Thai AirAsia X
20 Sep - 04 Oct	Thai AirAsia X
25 Sep - 04 Oct	Thai AirAsia X
05 Sep - 20 Oct	Thai AirAsia X
30 Sep - 04 Oct	Peach
27 Sep - 04 Oct	Thai AirAsia X
28 Sep - 04 Oct	Thai AirAsia X
16 Sep - 03 Oct	Thai 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 $298

Return flights