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

Return flights

03 Sep - 10 Sep	Aer Lingus	direct
03 Sep - 25 Sep	Aer Lingus	direct
10 Sep - 24 Sep	Aer Lingus	direct
10 Sep - 17 Sep	Aer Lingus	direct
09 Sep - 20 Sep	TAP
23 Sep - 29 Sep	TAP
13 Sep - 20 Sep	TAP
02 Sep - 07 Sep	TAP
11 Sep - 18 Sep	Aer Lingus	direct
05 Sep - 12 Sep	Aer Lingus	direct
30 Sep - 07 Oct	Aer Lingus	direct
18 Sep - 02 Oct	Aer Lingus	direct
27 Sep - 10 Oct	Aer Lingus	direct
29 Sep - 06 Oct	Aer Lingus	direct
26 Sep - 03 Oct	Aer Lingus	direct

Also check the deals for one-way flights from Los Angeles to Dublin in September.

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 September from $427

Return flights