AirHint found the following cheapest one-way flights from Chiang Mai (CNX) to Busan (PUS) in September 2025 (see full year).

One-Way flights

23 Sep	Thai VietJet Air
30 Sep	Thai AirAsia
29 Sep	Thai VietJet Air
28 Sep	Eastar Jet	direct
07 Sep	Thai AirAsia
06 Sep	Thai AirAsia
08 Sep	HK Express
03 Sep	Thai AirAsia
09 Sep	HK Express
10 Sep	HK Express

Also check the deals for return flights from Chiang Mai to Busan 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 one-way flights from Chiang Mai to Busan in September from $143

One-Way flights