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

Return flights

27 Sep - 05 Oct	VietJet Air	direct
27 Sep - 30 Sep	VietJet Air
30 Sep - 07 Oct	VietJet Air	direct
27 Sep - 29 Sep	Thai AirAsia
27 Sep - 18 Oct	Thai AirAsia
20 Sep - 22 Sep	Thai AirAsia
05 Sep - 13 Sep	Thai AirAsia
12 Sep - 13 Sep	Thai AirAsia
20 Sep - 29 Sep	Thai AirAsia
04 Sep - 13 Sep	Thai AirAsia
05 Sep - 22 Sep	Thai AirAsia
12 Sep - 22 Sep	Thai AirAsia
09 Sep - 13 Sep	Thai AirAsia
27 Sep - 15 Oct	Thai AirAsia
27 Sep - 02 Oct	Thai AirAsia
30 Sep - 18 Oct	Thai AirAsia
29 Sep - 18 Oct	Thai AirAsia
20 Sep - 02 Oct	Thai AirAsia
18 Sep - 02 Oct	Thai AirAsia
26 Sep - 15 Oct	Thai AirAsia

Also check the deals for one-way flights from Hanoi 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 Hanoi to Kaohsiung in September from $191

Return flights