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

Return flights

18 Sep - 03 Oct	AirAsia
18 Sep - 20 Sep	AirAsia
18 Sep - 30 Sep	AirAsia
22 Sep - 03 Oct	AirAsia
22 Sep - 30 Sep	AirAsia
27 Sep - 15 Oct	AirAsia
18 Sep - 05 Oct	AirAsia
27 Sep - 03 Oct	AirAsia
18 Sep - 04 Oct	AirAsia
18 Sep - 06 Oct	AirAsia
27 Sep - 30 Sep	AirAsia
22 Sep - 05 Oct	AirAsia
22 Sep - 12 Oct	AirAsia
21 Sep - 03 Oct	AirAsia
21 Sep - 30 Sep	AirAsia
18 Sep - 23 Sep	AirAsia
17 Sep - 20 Sep	AirAsia
17 Sep - 30 Sep	AirAsia
22 Sep - 23 Sep	AirAsia
19 Sep - 30 Sep	AirAsia

Also check the deals for one-way flights from Chiang Mai to Perth 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.

Book a cheap hotel in Perth

Cheap car rent in Perth

Cheapest return flights from Chiang Mai to Perth in September from $455

Return flights