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

Return flights

10 Dec - 17 Dec	Icelandair
10 Dec - 15 Dec	Icelandair
06 Dec - 15 Dec	Icelandair
05 Dec - 14 Dec	Icelandair
02 Dec - 06 Dec	Icelandair
31 Dec - 05 Jan	Delta
16 Dec - 23 Dec	Icelandair
15 Dec - 22 Dec	Icelandair
13 Dec - 05 Jan	Finnair
11 Dec - 30 Dec	Finnair
14 Dec - 05 Jan	Finnair
17 Dec - 30 Dec	Alaska Airlines
18 Dec - 06 Jan	Finnair
11 Dec - 28 Dec	Finnair
25 Dec - 06 Jan	Finnair
21 Dec - 02 Jan	Hawaiian Airlines
21 Dec - 05 Jan	Finnair
26 Dec - 02 Jan	Finnair
21 Dec - 01 Jan	Finnair
13 Dec - 04 Jan	Finnair

Also check the deals for one-way flights from San Jose 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 San Jose to Dublin in December from $727

Return flights