AirHint found the following cheapest return flights from Denver (DEN) to Prague (PRG) in December 2025 (see full year).
Return flights
| 28 Dec - 13 Jan | Lufthansa | ||
| 29 Dec - 12 Jan | Lufthansa | ||
| 10 Dec - 07 Jan | Lufthansa | ||
| 19 Dec - 02 Jan | Frontier Airlines | ||
| 18 Dec - 30 Dec | Frontier Airlines |
Also check the deals for one-way flights from Denver to Prague in December.
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