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

Return flights

24 Dec - 31 Dec	Air Canada
08 Dec - 15 Dec	TAP
12 Dec - 19 Dec	TAP
01 Dec - 08 Dec	Aer Lingus
05 Dec - 12 Dec	TAP
07 Dec - 14 Dec	TAP
03 Dec - 10 Dec	FrenchBee
14 Dec - 21 Dec	TAP
25 Dec - 01 Jan	Lufthansa
10 Dec - 17 Dec	Lufthansa
11 Dec - 18 Dec	Lufthansa
30 Dec - 06 Jan	SWISS
31 Dec - 07 Jan	SWISS
28 Dec - 04 Jan	Air Canada
29 Dec - 05 Jan	Lufthansa
26 Dec - 02 Jan	Air Canada
27 Dec - 03 Jan	Air Canada
19 Dec - 04 Jan	Air Canada

Also check the deals for one-way flights from Montreal to Dublin 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 Dublin in December from 494€

Return flights