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

Return flights

03 Dec - 14 Dec	United
05 Dec - 15 Dec	United
06 Dec - 19 Dec	Air Canada
08 Dec - 17 Dec	United
14 Dec - 28 Dec	United
15 Dec - 15 Jan	United
13 Dec - 13 Jan	United
15 Dec - 31 Jan	United
01 Dec - 21 Dec	Air Canada
07 Dec - 18 Dec	Air France
01 Dec - 04 Dec	Air Canada
27 Dec - 21 Jan	United
30 Dec - 12 Jan	United
17 Dec - 31 Dec	United
16 Dec - 27 Dec	United
30 Dec - 08 Jan	United
27 Dec - 10 Jan	United
28 Dec - 10 Jan	Aer Lingus
26 Dec - 21 Jan	United
26 Dec - 15 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