AirHint found the following cheapest return flights from Houston (IAH) to Athens (ATH) in December 2025 (see full year).
Return flights
| 27 Dec - 15 Jan | British Airways | ||
| 31 Dec - 06 Jan | British Airways | ||
| 29 Dec - 05 Jan | Lufthansa | ||
| 27 Dec - 03 Jan | Frontier Airlines | ||
| 26 Dec - 03 Jan | Air France |
Also check the deals for one-way flights from Houston to Athens in December.
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