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

Return flights

19 Mar - 23 Mar	Aer Lingus	direct
06 Mar - 09 Mar	Aer Lingus	direct
18 Mar - 21 Mar	Aer Lingus	direct
18 Mar - 22 Mar	Aer Lingus	direct
06 Mar - 08 Mar	Aer Lingus	direct
01 Mar - 14 Mar	Aer Lingus	direct
16 Mar - 19 Mar	Aer Lingus	direct
29 Mar - 01 Apr	Aer Lingus	direct
13 Mar - 15 Mar	Aer Lingus	direct
30 Mar - 02 Apr	Aer Lingus	direct
27 Mar - 29 Mar	Aer Lingus	direct

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

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 March from 98€

Return flights