AirHint found the following cheapest return flights from Southampton (SOU) to Newark (EWR) in December 2025 (see full year).
Return flights
| 12 Dec - 15 Dec | Aer Lingus | ||
| 03 Dec - 10 Dec | Delta | ||
| 04 Dec - 11 Dec | Aer Lingus | ||
| 11 Dec - 15 Dec | KLM | ||
| 05 Dec - 10 Dec | Aer Lingus | ||
| 26 Dec - 28 Dec | Aer Lingus | ||
| 28 Dec - 01 Jan | Aer Lingus |
Also check the deals for one-way flights from Southampton to Newark in December.
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