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

Return flights

21 Oct - 29 Oct	Copa
21 Oct - 30 Oct	Copa
07 Oct - 29 Oct	Copa
21 Oct - 01 Nov	Copa
15 Oct - 22 Oct	Copa
21 Oct - 28 Oct	Copa
23 Oct - 30 Oct	Copa
22 Oct - 29 Oct	Copa
22 Oct - 31 Oct	Copa
21 Oct - 31 Oct	Copa
29 Oct - 05 Nov	Copa
20 Oct - 29 Oct	Copa
28 Oct - 09 Nov	Copa
30 Oct - 06 Nov	Delta
29 Oct - 10 Nov	Delta
27 Oct - 20 Nov	Delta
31 Oct - 15 Nov	Delta
27 Oct - 03 Nov	LATAM Airlines Group
26 Oct - 02 Nov	LATAM Airlines Group
31 Oct - 07 Nov	LATAM Airlines Group

Also check the deals for one-way flights from Montreal to Sao Paulo in October.

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 October from 488€

Return flights