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

Return flights

01 Dec - 08 Dec	Copa
02 Dec - 09 Dec	Copa
04 Dec - 11 Dec	Copa
05 Dec - 12 Dec	LATAM Airlines Group
07 Dec - 14 Dec	LATAM Airlines Group
24 Dec - 21 Jan	LATAM Airlines Group
17 Dec - 22 Jan	Arajet
09 Dec - 16 Dec	LATAM Airlines Group
10 Dec - 17 Dec	LATAM Airlines Group
24 Dec - 31 Dec	LATAM Airlines Group
22 Dec - 29 Dec	LATAM Airlines Group
05 Dec - 19 Dec	Copa
17 Dec - 09 Jan	Arajet
17 Dec - 10 Jan	Arajet
22 Dec - 01 Jan	Arajet
31 Dec - 07 Jan	Copa
17 Dec - 20 Jan	Air Canada	direct
17 Dec - 18 Jan	Air Canada	direct
17 Dec - 21 Jan	Air Canada	direct
17 Dec - 22 Jan	Air Canada	direct

Also check the deals for one-way flights from Montreal 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 Montreal to Sao Paulo in December from $625

Return flights