AirHint found the following cheapest return flights from Washington (DCA) to Copenhagen (CPH) in December 2025 (see full year).
Return flights
| 31 Dec - 07 Jan | British Airways | ||
| 24 Dec - 31 Dec | British Airways | ||
| 22 Dec - 27 Dec | Virgin Atlantic | ||
| 30 Dec - 06 Jan | British Airways | ||
| 31 Dec - 04 Jan | TAP | ||
| 29 Dec - 05 Jan | British Airways |
Also check the deals for one-way flights from Washington to Copenhagen in December.
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