AirHint found the following cheapest return flights from Houston (HOU) to Copenhagen (CPH) in December 2025 (see full year).
Return flights
| 30 Dec - 06 Jan | Frontier Airlines | ||
| 23 Dec - 06 Jan | Frontier Airlines | ||
| 26 Dec - 02 Jan | KLM | ||
| 22 Dec - 01 Jan | Air France |
Also check the deals for one-way flights from Houston to Copenhagen in December.
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