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

Return flights

03 Dec - 15 Dec	TAP
03 Dec - 13 Jan	Aer Lingus	direct
05 Dec - 08 Dec	Aer Lingus	direct
06 Dec - 27 Dec	TAP
09 Dec - 09 Jan	TAP
22 Dec - 29 Dec	TAP
16 Dec - 29 Dec	TAP
25 Dec - 17 Jan	TAP
25 Dec - 22 Jan	British Airways
28 Dec - 12 Jan	TAP
17 Dec - 07 Jan	TAP
17 Dec - 10 Jan	TAP
30 Dec - 24 Jan	British Airways
14 Dec - 10 Jan	TAP
16 Dec - 11 Jan	TAP
15 Dec - 21 Dec	British Airways
05 Dec - 28 Dec	TAP
11 Dec - 30 Dec	British Airways
10 Dec - 17 Dec	Icelandair
12 Dec - 28 Dec	Icelandair

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 353€

Return flights