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

Return flights

28 Oct - 01 Nov	United
28 Oct - 31 Oct	United
25 Oct - 01 Nov	United
27 Oct - 31 Oct	WestJet
27 Oct - 04 Nov	WestJet
29 Oct - 03 Nov	WestJet
29 Oct - 04 Nov	WestJet
29 Oct - 05 Nov	WestJet
29 Oct - 01 Nov	United
27 Oct - 03 Nov	WestJet
25 Oct - 29 Oct	United
25 Oct - 27 Oct	United
29 Oct - 06 Nov	WestJet
29 Oct - 12 Nov	WestJet
25 Oct - 28 Oct	United
27 Oct - 30 Oct	WestJet
26 Oct - 31 Oct	United
28 Oct - 30 Oct	United
25 Oct - 30 Oct	United
26 Oct - 30 Oct	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Montreal to Cancun 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 Cancun in October from $288

Return flights