AirHint found the following cheapest return flights from Seoul (ICN) to Taichung (RMQ) in September 2026 (see full year).

Return flights

07 Sep - 09 Sep	HK Express
07 Sep - 11 Sep	HK Express
07 Sep - 12 Sep	HK Express
07 Sep - 10 Sep	HK Express
11 Sep - 14 Sep	Cathay Pacific
09 Sep - 12 Sep	Cathay Pacific
17 Sep - 20 Sep	Cathay Pacific
11 Sep - 15 Sep	HK Express
16 Sep - 20 Sep	Cathay Pacific
22 Sep - 27 Sep	Cathay Pacific
22 Sep - 04 Oct	Cathay Pacific
28 Sep - 07 Oct	Cathay Pacific
24 Sep - 04 Oct	HK Express

Also check the deals for one-way flights from Seoul to Taichung 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 Seoul to Taichung in September from $332

Return flights