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

Return flights

24 Sep - 22 Oct	Lufthansa
14 Sep - 22 Oct	SWISS
14 Sep - 24 Sep	China Eastern
23 Sep - 09 Oct	Etihad Airways
24 Sep - 17 Oct	China Southern
11 Sep - 15 Oct	Etihad Airways
23 Sep - 14 Oct	Etihad Airways
23 Sep - 15 Oct	Etihad Airways
23 Sep - 16 Oct	Etihad Airways
30 Sep - 22 Oct	Lufthansa
25 Sep - 22 Oct	Lufthansa
18 Sep - 23 Sep	Air India
09 Sep - 23 Sep	Air India
04 Sep - 23 Sep	Air India
16 Sep - 23 Sep	Air India
04 Sep - 19 Sep	Air India
02 Sep - 16 Sep	Finnair
03 Sep - 19 Sep	Air India
02 Sep - 09 Sep	Finnair
09 Sep - 26 Sep	Air India

Also check the deals for one-way flights from Amsterdam 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 Amsterdam to Seoul in September from 475€

Return flights