AirHint found the following cheapest return flights from Washington (DCA) to Copenhagen (CPH) in December 2025 (see full year).

Return flights

15 Dec - 12 Jan	jetBlue
02 Dec - 08 Dec	Scandinavian Airlines
04 Dec - 10 Dec	Scandinavian Airlines
04 Dec - 08 Dec	Scandinavian Airlines
05 Dec - 08 Dec	Scandinavian Airlines
11 Dec - 07 Jan	Icelandair
05 Dec - 12 Dec	British Airways
30 Dec - 06 Jan	British Airways
10 Dec - 01 Jan	Scandinavian Airlines
27 Dec - 21 Jan	Scandinavian Airlines
16 Dec - 10 Jan	Icelandair
12 Dec - 18 Dec	Icelandair
25 Dec - 31 Dec	jetBlue
24 Dec - 31 Dec	British Airways
23 Dec - 30 Dec	jetBlue
29 Dec - 04 Jan	jetBlue
29 Dec - 03 Jan	jetBlue
28 Dec - 03 Jan	jetBlue
18 Dec - 22 Dec	Icelandair
09 Dec - 03 Jan	TAP

Also check the deals for one-way flights from Washington to Copenhagen in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to Copenhagen in December from 575€

Return flights