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

Return flights

11 Jul - 15 Jul	United
08 Jul - 15 Jul	United
01 Jul - 15 Jul	United
16 Jul - 28 Jul	United
15 Jul - 21 Jul	United
01 Jul - 09 Jul	United
01 Jul - 12 Jul	United
08 Jul - 12 Jul	United
15 Jul - 29 Jul	United
07 Jul - 15 Jul	United
28 Jul - 07 Aug	Arajet
30 Jul - 20 Aug	WestJet
29 Jul - 24 Aug	WestJet
31 Jul - 07 Aug	Air Transat
29 Jul - 19 Aug	United
30 Jul - 11 Aug	WestJet
11 Jul - 07 Aug	Arajet
23 Jul - 06 Aug	United
23 Jul - 13 Aug	United
30 Jul - 03 Aug	WestJet

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

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 July from $346

Return flights