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

Return flights

02 Dec - 09 Dec	Icelandair
17 Dec - 24 Dec	Icelandair
02 Dec - 09 Dec	Scandinavian Airlines	direct
12 Dec - 19 Dec	Icelandair
18 Dec - 25 Dec	Air Canada
22 Dec - 29 Dec	Icelandair
12 Dec - 19 Dec	Scandinavian Airlines	direct
18 Dec - 25 Dec	Scandinavian Airlines	direct

Also check the deals for one-way flights from Boston 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 Boston to Copenhagen in December from $443

Return flights