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

Return flights

03 Sep - 10 Sep	Air Canada
03 Sep - 17 Sep	Air Canada
14 Sep - 24 Sep	Air Canada
05 Sep - 13 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
24 Sep - 13 Oct	Air Canada
26 Sep - 29 Sep	Air Canada
01 Sep - 08 Sep	Qatar Airways
16 Sep - 26 Sep	Emirates
09 Sep - 18 Sep	Air Canada
26 Sep - 13 Oct	Air Canada
03 Sep - 16 Sep	Qatar Airways
26 Sep - 11 Oct	Air Canada
27 Sep - 04 Oct	Emirates
30 Sep - 14 Oct	Qatar Airways
26 Sep - 12 Oct	Emirates
27 Sep - 09 Oct	Qatar Airways
26 Sep - 09 Oct	Delta

Also check the deals for one-way flights from Seoul to Buenos Aires 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 Buenos Aires in September from $1722

Return flights