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

Return flights

02 Sep - 17 Sep	Ryanair
01 Sep - 08 Sep	Ryanair
01 Sep - 10 Sep	Ryanair
01 Sep - 27 Oct	Ryanair
04 Sep - 11 Sep	Ryanair
08 Sep - 18 Sep	Ryanair
22 Sep - 17 Oct	Ryanair
08 Sep - 23 Sep	Aer Lingus
29 Sep - 17 Oct	Etihad Airways
29 Sep - 13 Oct	Etihad Airways
08 Sep - 09 Oct	Etihad Airways
11 Sep - 15 Oct	Etihad Airways
15 Sep - 17 Sep	Ryanair
22 Sep - 18 Oct	Ryanair
07 Sep - 17 Sep	Hainan Airlines
04 Sep - 15 Sep	Hainan Airlines
15 Sep - 21 Sep	Ryanair
29 Sep - 11 Oct	Etihad Airways
24 Sep - 09 Oct	Air France
24 Sep - 10 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 495€

Return flights