AirHint found the following cheapest one-way flights from Seoul (ICN) to Dublin (DUB) in September 2025 (see full year).

One-Way flights

09 Sep	T'way Air
17 Sep	China Eastern
03 Sep	China Southern
11 Sep	MIAT Mongolian Airlines
01 Sep	China Southern
08 Sep	China Southern
14 Sep	MIAT Mongolian Airlines
25 Sep	Jeju Air
29 Sep	Etihad Airways
28 Sep	Jeju Air

Also check the deals for return flights from Seoul to Dublin 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 Seoul to Dublin in September from 282€

One-Way flights