AirHint found the following cheapest return flights from Montreal (YUL) to Cancun (CUN) in May 2026 (see full year).

Return flights

06 May - 13 May	United
05 May - 13 May	United
01 May - 07 May	WestJet
11 May - 17 May	Arajet
13 May - 17 May	Arajet
18 May - 26 May	Arajet
31 May - 07 Jun	WestJet
09 May - 03 Jun	WestJet
04 May - 10 May	Arajet
18 May - 28 May	Arajet
04 May - 14 May	Arajet
04 May - 12 May	Arajet
25 May - 01 Jun	Air Transat	direct
27 May - 03 Jun	Air Transat	direct
26 May - 02 Jun	Air Transat	direct
28 May - 04 Jun	Air Transat	direct
27 May - 01 Jun	Air Canada
28 May - 01 Jun	Air Transat	direct
09 May - 03 Jun	Air Canada	direct
27 May - 01 Jun	Air Transat	direct

Also check the deals for one-way flights from Montreal to Cancun in May.

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 May from $365

Return flights