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

Return flights

05 May - 12 May	United
07 May - 14 May	United
27 May - 03 Jun	United
13 May - 20 May	United
21 May - 28 May	Air Transat
09 May - 16 May	United
01 May - 08 May	United
04 May - 11 May	United
12 May - 19 May	Air Transat
19 May - 26 May	Air Transat
20 May - 27 May	Air Transat	direct
28 May - 04 Jun	Air Transat
29 May - 05 Jun	United
30 May - 10 Jun	Delta
25 May - 01 Jun	Arajet
26 May - 02 Jun	Air Transat	direct
25 May - 01 Jun	Air Transat	direct
27 May - 03 Jun	Air Transat	direct
28 May - 04 Jun	Air Transat	direct
30 May - 10 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 377€

Return flights