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

Return flights

18 Sep - 25 Sep	Thai AirAsia
09 Sep - 13 Sep	Thai Lion Air
08 Sep - 14 Sep	Nok Air
11 Sep - 17 Sep	Thai AirAsia
11 Sep - 21 Sep	Thai AirAsia
11 Sep - 24 Sep	Thai AirAsia
11 Sep - 18 Sep	Thai AirAsia
11 Sep - 25 Sep	Thai AirAsia
11 Sep - 30 Sep	Thai AirAsia
11 Sep - 28 Sep	Thai AirAsia
27 Sep - 18 Oct	Thai AirAsia
29 Sep - 18 Oct	Thai AirAsia
25 Sep - 14 Oct	Thai AirAsia
27 Sep - 14 Oct	Thai AirAsia
23 Sep - 14 Oct	Thai AirAsia
29 Sep - 06 Oct	Thai Lion Air
29 Sep - 14 Oct	Thai AirAsia
29 Sep - 19 Oct	Thai AirAsia
28 Sep - 18 Oct	Thai AirAsia
28 Sep - 14 Oct	Thai AirAsia

Also check the deals for one-way flights from Chiang Mai to Kaohsiung 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 Chiang Mai to Kaohsiung in September from 175€

Return flights