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

Return flights

02 Dec - 09 Dec	Aer Lingus	direct
03 Dec - 10 Dec	Aer Lingus	direct
10 Dec - 14 Dec	United
08 Dec - 15 Dec	United
10 Dec - 14 Dec	Aer Lingus	direct
08 Dec - 15 Dec	Aer Lingus	direct
28 Dec - 11 Jan	Delta
13 Dec - 20 Dec	Aer Lingus	direct
16 Dec - 05 Jan	SWISS
15 Dec - 29 Dec	Aer Lingus	direct
26 Dec - 05 Jan	TAP
20 Dec - 02 Jan	Scandinavian Airlines
24 Dec - 02 Jan	Delta
12 Dec - 01 Jan	Aer Lingus
16 Dec - 05 Jan	Aer Lingus	direct
23 Dec - 30 Dec	Aer Lingus	direct
23 Dec - 03 Jan	Delta
20 Dec - 02 Jan	Aer Lingus	direct

Also check the deals for one-way flights from San Francisco 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 Francisco to Dublin in December from 391€

Return flights