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

Return flights

13 Sep - 21 Sep	American Airlines
12 Sep - 18 Sep	American Airlines
19 Sep - 18 Oct	American Airlines
23 Sep - 26 Sep	American Airlines
20 Sep - 18 Oct	Aeromexico
20 Sep - 05 Oct	American Airlines
21 Sep - 27 Oct	Air China
14 Sep - 27 Oct	Air China
28 Sep - 05 Oct	Aeromexico
17 Sep - 23 Sep	Air China
21 Sep - 16 Oct	American Airlines
09 Sep - 30 Sep	Ethiopian Airlines
10 Sep - 01 Oct	Air France
10 Sep - 23 Sep	Air France
04 Sep - 09 Sep	Ethiopian Airlines
02 Sep - 24 Sep	Ethiopian Airlines
26 Sep - 01 Oct	Ethiopian Airlines
16 Sep - 25 Sep	Ethiopian Airlines
10 Sep - 16 Sep	Air France
26 Sep - 03 Oct	Ethiopian Airlines

Also check the deals for one-way flights from Seoul to Sao Paulo 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 Sao Paulo in September from 816€

Return flights