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

Return flights

05 Sep - 12 Sep	Air China
05 Sep - 19 Sep	Air China
15 Sep - 21 Sep	Air China
08 Sep - 19 Sep	Air China
10 Sep - 19 Sep	Air China
17 Sep - 23 Sep	Air China
25 Sep - 13 Oct	SKY express
23 Sep - 13 Oct	Etihad Airways
03 Sep - 09 Sep	Air China
26 Sep - 17 Oct	Aegean Airlines
30 Sep - 19 Oct	Air Arabia
26 Sep - 18 Oct	Aegean Airlines
25 Sep - 09 Oct	Etihad Airways
26 Sep - 13 Oct	Aegean Airlines
06 Sep - 19 Sep	Air China
06 Sep - 12 Sep	Air China
14 Sep - 21 Sep	SKY express
26 Sep - 16 Oct	Aegean Airlines
16 Sep - 10 Oct	Etihad Airways
27 Sep - 18 Oct	Air Arabia

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 $621

Return flights