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

Return flights

12 May - 15 May	United
15 May - 21 May	Arajet
27 May - 03 Jun	WestJet
04 May - 11 May	WestJet
06 May - 13 May	WestJet
18 May - 25 May	WestJet
20 May - 27 May	WestJet
19 May - 26 May	WestJet
08 May - 15 May	United
05 May - 13 May	United
01 May - 08 May	United
28 May - 04 Jun	WestJet
30 May - 06 Jun	WestJet
26 May - 02 Jun	Air Transat	direct
28 May - 04 Jun	Air Transat	direct
25 May - 01 Jun	Air Transat	direct
27 May - 03 Jun	Air Transat	direct
31 May - 07 Jun	Air Canada	direct
30 May - 06 Jun	Air Canada	direct
29 May - 05 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 339€

Return flights