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

Return flights

19 Sep - 22 Sep	Air China
12 Sep - 17 Sep	Air China
19 Sep - 29 Sep	Air China
15 Sep - 25 Sep	Scandinavian Airlines
15 Sep - 18 Sep	Scandinavian Airlines
18 Sep - 20 Sep	Air China
15 Sep - 02 Oct	Scandinavian Airlines
11 Sep - 18 Sep	China Eastern
16 Sep - 29 Sep	Air China
17 Sep - 20 Sep	China Eastern
25 Sep - 13 Oct	Eastar Jet
09 Sep - 20 Sep	China Eastern
30 Sep - 01 Oct	T'way Air
27 Sep - 15 Oct	Eastar Jet
26 Sep - 08 Oct	Ethiopian Airlines
27 Sep - 19 Oct	Scandinavian Airlines
23 Sep - 05 Oct	Lufthansa
24 Sep - 01 Oct	Air France
25 Sep - 03 Oct	Air France
29 Sep - 05 Oct	Air France

Also check the deals for one-way flights from Seoul to Athens 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 Seoul to Athens in September from 577€

Return flights