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

One-Way flights

14 Sep	Thai VietJet Air	direct
29 Sep	Thai VietJet Air	direct
08 Sep	Thai VietJet Air	direct
22 Sep	Thai VietJet Air	direct
15 Sep	Thai VietJet Air	direct
26 Sep	Thai VietJet Air	direct
28 Sep	Thai VietJet Air	direct
12 Sep	Thai VietJet Air	direct
24 Sep	T'way Air
23 Sep	Air China

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 104€

One-Way flights