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

Return flights

01 Dec - 05 Dec	WestJet
01 Dec - 15 Dec	WestJet
03 Dec - 08 Dec	WestJet
01 Dec - 08 Dec	WestJet
03 Dec - 10 Dec	WestJet
02 Dec - 09 Dec	WestJet
02 Dec - 08 Dec	WestJet
10 Dec - 24 Dec	WestJet
12 Dec - 29 Dec	WestJet
10 Dec - 17 Dec	WestJet
30 Dec - 13 Jan	WestJet
31 Dec - 12 Jan	Air Transat
17 Dec - 13 Jan	Air Canada
31 Dec - 10 Jan	Air Transat
31 Dec - 16 Jan	Air Transat
28 Dec - 08 Jan	Air Transat
12 Dec - 05 Jan	WestJet
28 Dec - 13 Jan	WestJet
15 Dec - 04 Jan	WestJet
31 Dec - 09 Jan	Porter Airlines (Canada) Ltd

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 237€

Return flights