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

Return flights

04 Dec - 11 Dec	Delta
01 Dec - 31 Jan	Delta
01 Dec - 08 Dec	LATAM Airlines Group
03 Dec - 10 Dec	LATAM Airlines Group
05 Dec - 12 Dec	Arajet
06 Dec - 13 Dec	LATAM Airlines Group
08 Dec - 15 Dec	Arajet
02 Dec - 09 Dec	Air Canada	direct
01 Dec - 08 Dec	Air Canada	direct
03 Dec - 10 Dec	Air Canada	direct
07 Dec - 14 Dec	LATAM Airlines Group
29 Dec - 23 Jan	Arajet
26 Dec - 26 Jan	Air Canada	direct
01 Dec - 31 Jan	Air Canada	direct
31 Dec - 07 Jan	Arajet
29 Dec - 23 Jan	Air Canada	direct
10 Dec - 07 Jan	WestJet
29 Dec - 28 Jan	Delta
22 Dec - 14 Jan	WestJet
22 Dec - 13 Jan	WestJet

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 507€

Return flights