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

Return flights

16 Sep - 24 Sep	China Eastern
07 Sep - 16 Sep	China Eastern
10 Sep - 17 Sep	China Southern
03 Sep - 12 Sep	China Southern
09 Sep - 14 Sep	China Southern
17 Sep - 24 Sep	China Eastern
05 Sep - 13 Sep	China Southern
22 Sep - 14 Oct	China Southern
29 Sep - 13 Oct	China Southern
06 Sep - 13 Sep	China Southern
19 Sep - 26 Sep	Air China
14 Sep - 24 Sep	Air China
26 Sep - 02 Oct	EVA Air
23 Sep - 05 Oct	Japan Airlines
24 Sep - 26 Oct	Japan Airlines
28 Sep - 02 Oct	Japan Airlines
30 Sep - 14 Oct	Japan Airlines
22 Sep - 02 Oct	Japan Airlines
28 Sep - 12 Oct	Japan Airlines
25 Sep - 12 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 $567

Return flights