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

Return flights

02 Dec - 09 Dec	Aer Lingus	direct
01 Dec - 08 Dec	Aer Lingus	direct
01 Dec - 14 Dec	Icelandair
10 Dec - 10 Jan	Icelandair
08 Dec - 18 Dec	Icelandair
10 Dec - 22 Dec	Icelandair
09 Dec - 16 Dec	Icelandair
15 Dec - 22 Dec	Icelandair
30 Dec - 09 Jan	TAP
03 Dec - 10 Dec	Icelandair
07 Dec - 30 Dec	Icelandair
12 Dec - 30 Dec	Icelandair
17 Dec - 07 Jan	Icelandair
22 Dec - 05 Jan	TAP
29 Dec - 06 Jan	TAP
22 Dec - 01 Jan	Icelandair
25 Dec - 04 Jan	Icelandair
23 Dec - 04 Jan	Icelandair
30 Dec - 09 Jan	Air Canada	direct
10 Dec - 03 Jan	TAP

Also check the deals for one-way flights from Toronto 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 Toronto to Dublin in December from $355

Return flights