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

Return flights

13 Dec - 17 Dec	Lufthansa
14 Dec - 17 Dec	Lufthansa
25 Dec - 09 Jan	Lufthansa
14 Dec - 21 Dec	Lufthansa
30 Dec - 06 Jan	SWISS
15 Dec - 29 Dec	Lufthansa
31 Dec - 07 Jan	SWISS
13 Dec - 20 Dec	Lufthansa
16 Dec - 26 Dec	Brussels Airlines
17 Dec - 24 Dec	Lufthansa
29 Dec - 08 Jan	Scandinavian Airlines	direct
26 Dec - 01 Jan	Scandinavian Airlines	direct
26 Dec - 02 Jan	Scandinavian Airlines	direct
24 Dec - 31 Dec	Lufthansa
24 Dec - 01 Jan	Lufthansa
23 Dec - 30 Dec	Lufthansa
25 Dec - 05 Jan	Air France
28 Dec - 03 Jan	Scandinavian Airlines	direct
15 Dec - 29 Dec	Scandinavian Airlines	direct
27 Dec - 03 Jan	SWISS

Also check the deals for one-way flights from San Francisco 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 San Francisco to Copenhagen in December from $629

Return flights