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

Return flights

02 Sep - 10 Sep	AirAsia
02 Sep - 09 Sep	AirAsia
05 Sep - 12 Sep	AirAsia
04 Sep - 07 Sep	Cathay Pacific
07 Sep - 21 Sep	AirAsia
12 Sep - 17 Sep	AirAsia
16 Sep - 25 Sep	Cebu Pacific
09 Sep - 16 Sep	Cebu Pacific
27 Sep - 04 Oct	Cebu Pacific
13 Sep - 15 Sep	Cebu Pacific
11 Sep - 16 Sep	Cebu Pacific
02 Sep - 01 Oct	Singapore Airlines
02 Sep - 01 Oct	Philippine Airlines	direct
10 Sep - 01 Oct	AirAsia
25 Sep - 10 Oct	AirAsia
25 Sep - 01 Oct	AirAsia
25 Sep - 06 Oct	AirAsia
25 Sep - 13 Oct	AirAsia
25 Sep - 05 Oct	AirAsia
25 Sep - 04 Oct	AirAsia

Also check the deals for one-way flights from Manila 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 Manila to Phnom-penh in September from 197€

Return flights