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

Return flights

09 Dec - 23 Dec	United
02 Dec - 10 Dec	United
03 Dec - 10 Dec	United
01 Dec - 08 Dec	WestJet
03 Dec - 17 Dec	Porter Airlines (Canada) Ltd
10 Dec - 15 Dec	WestJet
01 Dec - 11 Dec	United
10 Dec - 17 Dec	Porter Airlines (Canada) Ltd
15 Dec - 24 Dec	WestJet
10 Dec - 24 Dec	WestJet
14 Dec - 18 Jan	WestJet
31 Dec - 13 Jan	WestJet
31 Dec - 10 Jan	WestJet
31 Dec - 11 Jan	WestJet
31 Dec - 09 Jan	WestJet
14 Dec - 18 Jan	Air Transat	direct
07 Dec - 01 Jan	WestJet
29 Dec - 11 Jan	Arajet
09 Dec - 01 Jan	WestJet
29 Dec - 09 Jan	Arajet

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

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 December from 282€

Return flights