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

Return flights

16 Sep - 14 Oct	SWISS
18 Sep - 13 Oct	Lufthansa
18 Sep - 14 Oct	Lufthansa
28 Sep - 21 Oct	SWISS
17 Sep - 13 Oct	Lufthansa
09 Sep - 16 Sep	China Southern
10 Sep - 17 Sep	China Southern
21 Sep - 14 Oct	Etihad Airways
30 Sep - 17 Oct	Lufthansa
09 Sep - 24 Oct	Lufthansa
10 Sep - 16 Sep	China Southern
09 Sep - 17 Sep	China Southern
27 Sep - 26 Oct	SWISS
09 Sep - 15 Sep	China Southern
28 Sep - 17 Oct	SWISS
08 Sep - 21 Sep	China Southern
08 Sep - 16 Sep	China Southern
08 Sep - 17 Sep	China Southern
17 Sep - 21 Sep	China Southern
10 Sep - 14 Sep	China Southern

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 479€

Return flights