AirHint found the following cheapest return flights from Southampton (SOU) to Dublin (DUB) in August 2025 (see full year).

Return flights

20 Aug - 26 Aug	Aer Lingus	direct
26 Aug - 28 Aug	Aer Lingus	direct
26 Aug - 02 Sep	Aer Lingus	direct
26 Aug - 01 Sep	Aer Lingus	direct
30 Aug - 01 Sep	easyJet
19 Aug - 20 Aug	Aer Lingus	direct
13 Aug - 20 Aug	Aer Lingus	direct
12 Aug - 19 Aug	Aer Lingus	direct
29 Aug - 01 Sep	easyJet
29 Aug - 05 Sep	easyJet
24 Aug - 26 Aug	easyJet
26 Aug - 31 Aug	Aer Lingus	direct
28 Aug - 31 Aug	Aer Lingus	direct
08 Aug - 12 Aug	Aer Lingus	direct
25 Aug - 28 Aug	Aer Lingus	direct
29 Aug - 01 Sep	Aer Lingus	direct
29 Aug - 05 Sep	Aer Lingus	direct

Also check the deals for one-way flights from Southampton to Dublin in August.

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 Southampton to Dublin in August from $111

Return flights