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

One-Way flights

08 Sep	Thai VietJet Air	direct
14 Sep	Thai VietJet Air	direct
12 Sep	Thai VietJet Air	direct
19 Sep	Thai VietJet Air	direct
10 Sep	Jeju Air
24 Sep	T'way Air
23 Sep	Air China
20 Sep	Air China
16 Sep	Jeju Air

Also check the deals for return flights from Osaka 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 one-way flights from Osaka to Chiang Mai in September from $98

One-Way flights