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

Return flights

14 Sep - 23 Sep	Air Canada
14 Sep - 22 Sep	Air Canada
29 Sep - 25 Oct	Scandinavian Airlines
28 Sep - 07 Oct	SWISS
16 Sep - 23 Sep	SWISS
24 Sep - 01 Oct	SWISS
22 Sep - 01 Oct	SWISS
09 Sep - 13 Sep	jetBlue
09 Sep - 16 Sep	jetBlue
10 Sep - 04 Oct	jetBlue
17 Sep - 22 Sep	Scandinavian Airlines
12 Sep - 25 Sep	jetBlue
12 Sep - 19 Sep	jetBlue
28 Sep - 05 Oct	WestJet
17 Sep - 27 Sep	jetBlue
22 Sep - 02 Oct	jetBlue
28 Sep - 07 Oct	Aer Lingus	direct
16 Sep - 23 Sep	Aer Lingus	direct
27 Sep - 06 Oct	jetBlue
30 Sep - 07 Oct	Aer Lingus	direct

Also check the deals for one-way flights from San Francisco 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 Francisco to Dublin in September from $598

Return flights