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

Return flights

24 Sep - 10 Oct	Lufthansa
10 Sep - 24 Sep	Lufthansa
21 Sep - 17 Oct	Ryanair
09 Sep - 16 Sep	Etihad Airways
15 Sep - 23 Sep	KLM
15 Sep - 22 Sep	Lufthansa
15 Sep - 18 Sep	Lufthansa
02 Sep - 16 Sep	KLM
04 Sep - 17 Sep	Lufthansa
01 Sep - 13 Sep	Air France
15 Sep - 21 Sep	Lufthansa
04 Sep - 18 Sep	Lufthansa
25 Sep - 24 Oct	Etihad Airways
27 Sep - 18 Oct	Etihad Airways
26 Sep - 25 Oct	Ryanair
19 Sep - 11 Oct	Aer Lingus
26 Sep - 09 Oct	Etihad Airways
26 Sep - 18 Oct	Air France
25 Sep - 06 Oct	Lufthansa
26 Sep - 19 Oct	Air France

Also check the deals for one-way flights from Dublin 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 return flights from Dublin to Seoul in September from $700

Return flights