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

Return flights

06 Dec - 13 Dec	Icelandair
15 Dec - 10 Jan	Icelandair
10 Dec - 22 Dec	Icelandair
13 Dec - 23 Dec	Icelandair
29 Dec - 09 Jan	Icelandair
07 Dec - 15 Dec	Icelandair
29 Dec - 24 Jan	Icelandair
01 Dec - 05 Dec	Icelandair
22 Dec - 17 Jan	Icelandair
12 Dec - 13 Jan	Icelandair
18 Dec - 10 Jan	Icelandair
12 Dec - 19 Dec	Icelandair
23 Dec - 31 Dec	Icelandair
27 Dec - 17 Jan	Icelandair
18 Dec - 29 Dec	Icelandair
18 Dec - 28 Dec	Icelandair
18 Dec - 05 Jan	Icelandair
06 Dec - 27 Dec	Icelandair
25 Dec - 02 Jan	Finnair
19 Dec - 05 Jan	Lufthansa

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 $884

Return flights