AirHint found the following cheapest return flights from Chiang Mai (CNX) to Phnom-penh (PNH) in August 2025 (see full year).

Return flights

22 Aug - 29 Aug	Nok Air
25 Aug - 08 Sep	Thai AirAsia
19 Aug - 20 Aug	Thai VietJet Air
21 Aug - 08 Sep	Thai AirAsia
18 Aug - 23 Aug	Thai VietJet Air
25 Aug - 29 Aug	Thai AirAsia
25 Aug - 28 Aug	Thai AirAsia
23 Aug - 08 Sep	Thai AirAsia
20 Aug - 08 Sep	Thai AirAsia
21 Aug - 29 Aug	Thai AirAsia
25 Aug - 04 Sep	Thai AirAsia
25 Aug - 03 Sep	Thai AirAsia
21 Aug - 23 Aug	Thai AirAsia
18 Aug - 22 Aug	Thai VietJet Air
18 Aug - 19 Aug	Thai VietJet Air
18 Aug - 20 Aug	Thai VietJet Air
21 Aug - 04 Sep	Thai AirAsia
21 Aug - 03 Sep	Thai AirAsia
19 Aug - 08 Sep	Thai AirAsia
22 Aug - 08 Sep	Thai AirAsia

Also check the deals for one-way flights from Chiang Mai to Phnom-penh in August.

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 Chiang Mai to Phnom-penh in August from $179

Return flights