AirHint found the following cheapest return flights from San Diego (SAN) to Dublin (DUB) in September 2025 (see full year).

Return flights

03 Sep - 10 Sep	United
09 Sep - 16 Sep	United
23 Sep - 30 Sep	Hawaiian Airlines
05 Sep - 12 Sep	United
11 Sep - 18 Sep	United
28 Sep - 15 Oct	United
07 Sep - 14 Sep	United
01 Sep - 08 Sep	United
30 Sep - 07 Oct	United
17 Sep - 24 Sep	United
13 Sep - 20 Sep	United
28 Sep - 13 Oct	United
15 Sep - 22 Sep	United
27 Sep - 04 Oct	United
24 Sep - 01 Oct	Aer Lingus

Also check the deals for one-way flights from San Diego 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 San Diego to Dublin in September from 564€

Return flights