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

Return flights

13 Sep - 20 Sep	Ryanair
09 Sep - 23 Sep	Etihad Airways
15 Sep - 15 Oct	Etihad Airways
14 Sep - 25 Sep	Etihad Airways
08 Sep - 22 Sep	Etihad Airways
06 Sep - 22 Sep	Etihad Airways
05 Sep - 21 Sep	Air China
08 Sep - 21 Sep	Air China
20 Sep - 24 Sep	Ryanair
30 Sep - 14 Oct	Aegean Airlines
05 Sep - 11 Sep	Air China
14 Sep - 18 Sep	Scoot
13 Sep - 11 Oct	Wizz Air
27 Sep - 15 Oct	Air Arabia
16 Sep - 10 Oct	Lufthansa
27 Sep - 05 Oct	Air Arabia
25 Sep - 07 Oct	SKY express
27 Sep - 13 Oct	Air Serbia
29 Sep - 10 Oct	KLM
26 Sep - 02 Oct	Scoot

Also check the deals for one-way flights from Athens 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 Athens to Seoul in September from 580€

Return flights