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

Return flights

23 Oct - 28 Oct	Aer Lingus	direct
01 Oct - 08 Oct	easyJet
13 Oct - 16 Oct	easyJet
26 Oct - 28 Oct	Aer Lingus	direct
31 Oct - 03 Nov	Aer Lingus	direct
01 Oct - 05 Oct	Aer Lingus	direct
01 Oct - 08 Oct	Aer Lingus	direct
09 Oct - 12 Oct	Aer Lingus	direct
02 Oct - 05 Oct	Aer Lingus	direct
12 Oct - 13 Oct	Aer Lingus	direct
03 Oct - 09 Oct	Aer Lingus	direct
29 Oct - 01 Nov	Aer Lingus	direct
30 Oct - 02 Nov	Aer Lingus	direct
31 Oct - 02 Nov	Aer Lingus	direct

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

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 October from $139

Return flights