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

Return flights

13 Dec - 11 Jan	Aeromexico
22 Dec - 08 Jan	Aeromexico
28 Dec - 26 Jan	Air China
22 Dec - 23 Jan	Air China
04 Dec - 07 Dec	KLM
05 Dec - 10 Dec	Air France
03 Dec - 10 Dec	Air France
03 Dec - 07 Dec	Air France
03 Dec - 11 Dec	KLM
26 Dec - 21 Jan	Air France
26 Dec - 19 Jan	KLM
02 Dec - 11 Dec	Lufthansa
01 Dec - 08 Dec	Lufthansa
22 Dec - 05 Jan	Air China
20 Dec - 29 Dec	Air China
01 Dec - 07 Dec	Lufthansa
01 Dec - 09 Dec	Lufthansa
10 Dec - 29 Jan	Air France
11 Dec - 11 Jan	Korean Air
27 Dec - 01 Jan	Emirates

Also check the deals for one-way flights from Seoul to Sao Paulo in December.

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 December from 998€

Return flights