AirHint found the following cheapest return flights from Southampton (SOU) to Dublin (DUB) in January 2026 (see full year).

Return flights

28 Jan - 29 Jan	Aer Lingus	direct
29 Jan - 29 Jan	Aer Lingus	direct
23 Jan - 25 Jan	Aer Lingus	direct
30 Jan - 03 Feb	Aer Lingus	direct
31 Jan - 02 Feb	Aer Lingus	direct
30 Jan - 31 Jan	Aer Lingus	direct
30 Jan - 02 Feb	Aer Lingus	direct
30 Jan - 01 Feb	Aer Lingus	direct
30 Jan - 30 Jan	Aer Lingus	direct

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

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 January from $144

Return flights