AirHint found the following cheapest return flights from Seoul (GMP) to Taipei (TPE) in September 2026 (see full year).

Return flights

24 Sep - 28 Sep	China Airlines	direct
24 Sep - 27 Sep	China Airlines	direct
09 Sep - 12 Sep	Korean Air
11 Sep - 14 Sep	Korean Air
18 Sep - 20 Sep	Korean Air
02 Sep - 09 Sep	Korean Air
11 Sep - 15 Sep	Korean Air
11 Sep - 13 Sep	Korean Air
12 Sep - 20 Sep	Korean Air
19 Sep - 26 Sep	Korean Air
19 Sep - 03 Oct	Korean Air

Also check the deals for one-way flights from Seoul to Taipei 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 Taipei in September from 294€

Return flights