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

Return flights

15 Dec - 01 Jan	Iberia
15 Dec - 31 Dec	British Airways
14 Dec - 17 Jan	Royal Air Maroc
13 Dec - 29 Jan	TAP
15 Dec - 27 Dec	Iberia
17 Dec - 27 Dec	Iberia
14 Dec - 26 Jan	Royal Air Maroc
14 Dec - 18 Jan	Royal Air Maroc
14 Dec - 22 Jan	Royal Air Maroc
14 Dec - 23 Jan	Royal Air Maroc
14 Dec - 26 Dec	Royal Air Maroc
16 Dec - 20 Jan	KLM
14 Dec - 28 Jan	Royal Air Maroc
16 Dec - 24 Dec	GOL Linhas Aéreas
16 Dec - 25 Dec	GOL Linhas Aéreas
16 Dec - 27 Dec	GOL Linhas Aéreas
14 Dec - 08 Jan	Royal Air Maroc
13 Dec - 27 Dec	KLM
13 Dec - 26 Dec	KLM
13 Dec - 29 Dec	TAP	direct

Also check the deals for one-way flights from Sao Paulo to Lisbon 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 Lisbon in December from $830

Return flights