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

Return flights

13 Sep - 19 Sep	Air China
02 Sep - 07 Sep	Etihad Airways
27 Sep - 14 Oct	Etihad Airways
27 Sep - 13 Oct	Etihad Airways
08 Sep - 19 Sep	Air China
27 Sep - 11 Oct	Etihad Airways
30 Sep - 15 Oct	Etihad Airways
30 Sep - 16 Oct	Etihad Airways
10 Sep - 15 Sep	Air Arabia
05 Sep - 12 Sep	Air China
24 Sep - 11 Oct	Etihad Airways
09 Sep - 22 Sep	Etihad Airways
26 Sep - 13 Oct	Etihad Airways
25 Sep - 13 Oct	Etihad Airways
26 Sep - 14 Oct	Etihad Airways
01 Sep - 08 Sep	Aegean Airlines
24 Sep - 10 Oct	Lufthansa
10 Sep - 14 Sep	Air Arabia
12 Sep - 20 Sep	Air France
16 Sep - 20 Sep	KLM

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 553€

Return flights