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

Return flights

03 Sep - 30 Sep	Japan Airlines
12 Sep - 25 Sep	ANA
10 Sep - 19 Sep	ANA
02 Sep - 14 Sep	ANA
19 Sep - 28 Sep	ANA
03 Sep - 10 Sep	ANA
18 Sep - 29 Sep	ANA
07 Sep - 14 Sep	ANA
14 Sep - 24 Sep	ANA
01 Sep - 17 Sep	ANA
30 Sep - 11 Oct	ANA

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 788€

Return flights