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

Return flights

31 Dec - 05 Jan	Aer Lingus	direct
31 Dec - 04 Jan	Aer Lingus	direct
30 Dec - 06 Jan	Aer Lingus	direct
31 Dec - 01 Jan	Aer Lingus
31 Dec - 01 Jan	Aer Lingus	direct
30 Dec - 01 Jan	Aer Lingus
30 Dec - 31 Dec	Aer Lingus
31 Dec - 02 Jan	Aer Lingus	direct
30 Dec - 03 Jan	Aer Lingus
28 Dec - 01 Jan	KLM
30 Dec - 02 Jan	KLM
27 Dec - 31 Dec	KLM
27 Dec - 30 Dec	KLM
28 Dec - 29 Dec	easyJet
29 Dec - 30 Dec	Aer Lingus
30 Dec - 30 Dec	KLM
31 Dec - 31 Dec	KLM
30 Dec - 31 Dec	Aer Lingus	direct
29 Dec - 30 Dec	Aer Lingus	direct
27 Dec - 27 Dec	Aer Lingus

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

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.

Book a cheap hotel in Dublin

Cheap car rent in Dublin

Cheapest return flights from Southampton to Dublin in December from 88€

Return flights