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

Return flights

21 Mar - 24 Mar	easyJet
07 Mar - 09 Mar	easyJet
09 Mar - 15 Mar	easyJet
07 Mar - 08 Mar	easyJet
10 Mar - 16 Mar	easyJet
09 Mar - 11 Mar	easyJet
15 Mar - 19 Mar	easyJet
23 Mar - 26 Mar	easyJet
22 Mar - 26 Mar	easyJet
04 Mar - 11 Mar	Aer Lingus	direct
31 Mar - 08 Apr	Aer Lingus	direct
30 Mar - 06 Apr	Aer Lingus	direct
30 Mar - 07 Apr	easyJet
29 Mar - 12 Apr	Aer Lingus	direct
26 Mar - 07 Apr	Aer Lingus	direct
28 Mar - 01 Apr	Aer Lingus	direct
30 Mar - 07 Apr	Aer Lingus	direct
29 Mar - 07 Apr	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 $137

Return flights