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

Return flights

11 Sep - 14 Sep	China Southern
09 Sep - 14 Sep	China Southern
18 Sep - 22 Sep	China Southern
01 Sep - 08 Sep	China Southern
12 Sep - 14 Sep	China Southern
01 Sep - 15 Sep	China Southern
13 Sep - 17 Sep	China Southern
12 Sep - 15 Sep	China Southern
12 Sep - 16 Sep	China Southern
09 Sep - 16 Sep	China Southern
29 Sep - 01 Oct	AirAsia X
29 Sep - 05 Oct	AirAsia X
28 Sep - 01 Oct	AirAsia X
29 Sep - 19 Oct	AirAsia X
29 Sep - 10 Oct	AirAsia X
30 Sep - 01 Oct	AirAsia X
28 Sep - 05 Oct	AirAsia X
28 Sep - 19 Oct	AirAsia X
30 Sep - 05 Oct	AirAsia X
13 Sep - 01 Oct	AirAsia X

Also check the deals for one-way flights from Tokyo 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 Tokyo to Phnom-penh in September from $324

Return flights