AirHint found the following cheapest return flights from Montreal (YUL) to Rio De Janeiro (GIG) in October 2025 (see full year).

Return flights

19 Oct - 26 Oct	Avianca
20 Oct - 27 Oct	Avianca
22 Oct - 29 Oct	Avianca
27 Oct - 03 Nov	Avianca
26 Oct - 02 Nov	Avianca
01 Oct - 22 Oct	Avianca
06 Oct - 15 Oct	Avianca
01 Oct - 08 Oct	Avianca
15 Oct - 22 Oct	Avianca
06 Oct - 13 Oct	Avianca
08 Oct - 15 Oct	Avianca
24 Oct - 31 Oct	Avianca
29 Oct - 05 Nov	Avianca
31 Oct - 07 Nov	Avianca
29 Oct - 09 Nov	Avianca
28 Oct - 04 Nov	United
30 Oct - 06 Nov	LATAM Airlines Group
11 Oct - 01 Nov	Air Transat

Also check the deals for one-way flights from Montreal to Rio De Janeiro 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 Rio De Janeiro in October from 455€

Return flights