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

Return flights

10 Sep - 17 Sep	Lufthansa
03 Sep - 10 Sep	Lufthansa
09 Sep - 16 Sep	Etihad Airways
16 Sep - 21 Sep	Etihad Airways
16 Sep - 23 Sep	Etihad Airways
18 Sep - 23 Sep	Etihad Airways
16 Sep - 30 Sep	Etihad Airways
10 Sep - 24 Sep	Lufthansa
18 Sep - 24 Sep	KLM
10 Sep - 14 Sep	KLM
18 Sep - 03 Oct	Etihad Airways
23 Sep - 03 Oct	Etihad Airways
24 Sep - 03 Oct	Etihad Airways
03 Sep - 16 Oct	Finnair
25 Sep - 02 Oct	KLM
02 Sep - 07 Oct	Lufthansa
30 Sep - 08 Oct	Air Canada
29 Sep - 08 Oct	Air Canada
25 Sep - 09 Oct	KLM
26 Sep - 13 Oct	Emirates

Also check the deals for one-way 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 return flights from Seoul to Dublin in September from $687

Return flights