AirHint found the following cheapest return flights from Los Angeles (LAX) to Dublin (DUB) in December 2025 (see full year).

Return flights

03 Dec - 10 Dec	Aer Lingus	direct
01 Dec - 08 Dec	Air Canada
08 Dec - 15 Dec	Air Canada
01 Dec - 15 Dec	Air Canada
29 Dec - 14 Jan	Aer Lingus	direct
02 Dec - 09 Dec	Air Canada
02 Dec - 12 Dec	Air Canada
09 Dec - 16 Dec	Air Canada
02 Dec - 15 Dec	Air Canada
10 Dec - 17 Dec	United
28 Dec - 21 Jan	Iberia
28 Dec - 14 Jan	Iberia
10 Dec - 17 Dec	Aer Lingus	direct
28 Dec - 09 Jan	Lufthansa
29 Dec - 24 Jan	SWISS
31 Dec - 07 Jan	Aer Lingus	direct
13 Dec - 07 Jan	TAP
13 Dec - 31 Jan	United
13 Dec - 07 Jan	Aer Lingus	direct
27 Dec - 07 Jan	Aer Lingus	direct

Also check the deals for one-way flights from Los Angeles 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 Los Angeles to Dublin in December from $450

Return flights