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

One-Way flights

07 Oct	United
01 Oct	WestJet
27 Oct	Air Canada	direct
13 Oct	Air Canada	direct
01 Oct	Air Canada	direct
02 Oct	Air Transat	direct
08 Oct	Air Canada	direct
26 Oct	Air Canada
25 Oct	WestJet
04 Oct	Aeromexico

Also check the deals for return 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 one-way flights from Montreal to Cancun in October from 162€

One-Way flights