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

Return flights

24 Sep - 12 Oct	Air China
16 Sep - 13 Oct	Lufthansa
07 Sep - 30 Sep	Austrian Airlines
10 Sep - 17 Sep	Air China
17 Sep - 24 Sep	Lufthansa
15 Sep - 01 Oct	SWISS
25 Sep - 13 Oct	SWISS
18 Sep - 25 Sep	Lufthansa
25 Sep - 05 Oct	Lufthansa
08 Sep - 19 Sep	Air China
19 Sep - 24 Oct	Air China
19 Sep - 11 Oct	Lufthansa
13 Sep - 04 Oct	easyJet
08 Sep - 15 Sep	Air China
13 Sep - 28 Sep	Saudia
15 Sep - 12 Oct	Air China
26 Sep - 13 Oct	Air China
09 Sep - 30 Sep	Lufthansa
04 Sep - 15 Sep	SWISS
09 Sep - 23 Sep	Lufthansa

Also check the deals for one-way flights from Paris 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 Paris to Phnom-penh in September from 603€

Return flights