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

Return flights

04 Dec - 15 Dec	British Airways
01 Dec - 13 Jan	KLM
05 Dec - 07 Jan	British Airways
01 Dec - 08 Jan	KLM
04 Dec - 11 Dec	British Airways
30 Dec - 30 Jan	GOL Linhas Aéreas
27 Dec - 18 Jan	GOL Linhas Aéreas
27 Dec - 17 Jan	GOL Linhas Aéreas
30 Dec - 29 Jan	GOL Linhas Aéreas
27 Dec - 21 Jan	GOL Linhas Aéreas
15 Dec - 10 Jan	Air Europa
29 Dec - 14 Jan	Avianca
04 Dec - 11 Dec	Turkish Airlines	direct
18 Dec - 30 Dec	Air Europa
18 Dec - 30 Dec	Turkish Airlines	direct
13 Dec - 20 Dec	British Airways
23 Dec - 27 Dec	Turkish Airlines	direct
18 Dec - 27 Dec	ITA Airways
22 Dec - 28 Dec	KLM
21 Dec - 27 Dec	ITA Airways

Also check the deals for one-way flights from Sao Paulo to Istanbul 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 Sao Paulo to Istanbul in December from $841

Return flights