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

Return flights

04 Sep - 11 Sep	China Southern
16 Sep - 23 Sep	China Southern
18 Sep - 25 Sep	China Southern
13 Sep - 29 Sep	Air China
19 Sep - 25 Sep	EVA Air
12 Sep - 18 Sep	EVA Air
10 Sep - 18 Sep	EVA Air
22 Sep - 23 Sep	Korean Air
07 Sep - 29 Sep	Japan Airlines
07 Sep - 17 Sep	Japan Airlines
27 Sep - 05 Oct	Japan Airlines
25 Sep - 14 Oct	Japan Airlines
26 Sep - 14 Oct	Japan Airlines
28 Sep - 14 Oct	Japan Airlines
24 Sep - 12 Oct	Japan Airlines
25 Sep - 12 Oct	Japan Airlines
26 Sep - 12 Oct	Japan Airlines
24 Sep - 14 Oct	Japan Airlines
27 Sep - 14 Oct	Japan Airlines
29 Sep - 14 Oct	Japan Airlines

Also check the deals for one-way flights from Seoul to Amsterdam 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 Amsterdam in September from 516€

Return flights