AirHint found the following cheapest return flights from Manila (MNL) to Chiang Mai (CNX) in August 2025 (see full year).

Return flights

30 Aug - 06 Sep	Cebu Pacific
26 Aug - 02 Sep	Greater Bay Airlines
31 Aug - 05 Sep	Cebu Pacific
25 Aug - 07 Sep	AirAsia
25 Aug - 03 Sep	AirAsia
25 Aug - 10 Sep	AirAsia
25 Aug - 08 Sep	AirAsia
25 Aug - 05 Sep	AirAsia
25 Aug - 12 Sep	AirAsia
25 Aug - 27 Aug	AirAsia
31 Aug - 01 Sep	Cebu Pacific
25 Aug - 28 Aug	AirAsia
26 Aug - 28 Aug	Cebu Pacific
25 Aug - 29 Aug	AirAsia
19 Aug - 27 Aug	Cebu Pacific
25 Aug - 31 Aug	AirAsia
25 Aug - 26 Aug	AirAsia
27 Aug - 30 Aug	Cebu Pacific
22 Aug - 26 Aug	Vietnam Airlines
28 Aug - 31 Aug	Cebu Pacific

Also check the deals for one-way flights from Manila to Chiang Mai 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 Manila to Chiang Mai in August from $216

Return flights