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

Return flights

21 Sep - 29 Sep	United
09 Sep - 17 Sep	United
08 Sep - 17 Sep	United
21 Sep - 14 Oct	United
28 Sep - 14 Oct	United
29 Sep - 27 Oct	United
30 Sep - 24 Oct	United
30 Sep - 30 Oct	United
27 Sep - 15 Oct	United
24 Sep - 14 Oct	United
22 Sep - 09 Oct	United
29 Sep - 30 Oct	United
28 Sep - 26 Oct	United
15 Sep - 29 Sep	United
01 Sep - 17 Sep	United
15 Sep - 26 Sep	United
01 Sep - 15 Sep	United
01 Sep - 11 Sep	United
01 Sep - 30 Sep	United
02 Sep - 10 Sep	United

Also check the deals for one-way flights from Sao Paulo 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 Sao Paulo to Seoul in September from 869€

Return flights