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

Return flights

11 Sep - 17 Sep	Cebu Pacific	direct
23 Sep - 26 Sep	Cebu Pacific	direct
17 Sep - 22 Sep	AirAsia
28 Sep - 03 Oct	Cebu Pacific	direct
09 Sep - 17 Sep	AirAsia
11 Sep - 23 Sep	Cebu Pacific
07 Sep - 17 Sep	Philippines AirAsia Inc.
30 Sep - 07 Oct	Cebu Pacific
13 Sep - 17 Sep	Cebu Pacific
27 Sep - 15 Oct	AirAsia
14 Sep - 19 Sep	Cebu Pacific
14 Sep - 26 Sep	Cebu Pacific
27 Sep - 17 Oct	AirAsia
01 Sep - 17 Sep	AirAsia
30 Sep - 15 Oct	AirAsia
25 Sep - 15 Oct	AirAsia
27 Sep - 10 Oct	AirAsia
27 Sep - 08 Oct	AirAsia
27 Sep - 03 Oct	AirAsia
27 Sep - 06 Oct	AirAsia

Also check the deals for one-way flights from Manila to Chiang Mai 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 Chiang Mai in September from $128

Return flights