AirHint found the following cheapest return flights from Belfast (BHD) to Athens (ATH) in December 2025 (see full year).
Return flights
| 02 Dec - 04 Dec | Aer Lingus | ||
| 01 Dec - 01 Dec | British Airways | ||
| 24 Dec - 31 Dec | KLM | ||
| 19 Dec - 04 Jan | Aer Lingus | ||
| 27 Dec - 05 Jan | Aer Lingus | ||
| 28 Dec - 04 Jan | Aer Lingus |
Also check the deals for one-way flights from Belfast to Athens in December.
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