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

Return flights

02 Dec - 19 Dec	United
08 Dec - 17 Dec	United
29 Dec - 25 Jan	United
29 Dec - 11 Jan	United
01 Dec - 19 Dec	United
02 Dec - 18 Dec	United
15 Dec - 15 Jan	United
01 Dec - 18 Dec	United
26 Dec - 10 Jan	United
22 Dec - 10 Jan	United
13 Dec - 20 Dec	United
22 Dec - 28 Dec	United
28 Dec - 16 Jan	United
18 Dec - 02 Jan	United

Also check the deals for one-way flights from Dublin to San Jose 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 Dublin to San Jose in December from 703€

Return flights