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

Return flights

26 Sep - 05 Oct	Asiana Airlines
29 Sep - 29 Oct	Korean Air
22 Sep - 22 Oct	Korean Air
26 Sep - 01 Oct	Korean Air
25 Sep - 28 Sep	Korean Air
19 Sep - 30 Sep	Korean Air
29 Sep - 06 Oct	Korean Air
21 Sep - 25 Sep	Korean Air
25 Sep - 25 Oct	Korean Air
21 Sep - 28 Sep	Korean Air
27 Sep - 05 Oct	Korean Air
20 Sep - 27 Sep	Korean Air
23 Sep - 12 Oct	Air France
27 Sep - 12 Oct	Korean Air

Also check the deals for one-way flights from Seoul to Santiago 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 Santiago in September from $1518

Return flights