AirHint found the following cheapest one-way flights from Taipei (TSA) to Seoul (GMP) in September 2025 (see full year).

One-Way flights

30 Sep	Eastar Jet	direct
17 Sep	T'way Air	direct
18 Sep	Eastar Jet	direct
16 Sep	Eastar Jet	direct
23 Sep	Eastar Jet	direct
15 Sep	T'way Air	direct
22 Sep	T'way Air	direct
24 Sep	T'way Air	direct
28 Sep	T'way Air	direct
21 Sep	T'way Air	direct

Also check the deals for return flights from Taipei to Seoul 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 Taipei to Seoul in September from 52€

One-Way flights