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

Return flights

16 Dec - 23 Dec	Icelandair
13 Dec - 23 Dec	Icelandair
15 Dec - 23 Dec	Icelandair
12 Dec - 23 Dec	Icelandair
16 Dec - 26 Dec	Icelandair
13 Dec - 22 Dec	Icelandair
14 Dec - 23 Dec	Icelandair
11 Dec - 04 Jan	Icelandair

Also check the deals for one-way flights from Oakland 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 Oakland to Copenhagen in December from $808

Return flights