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

Return flights

05 Dec - 08 Dec	Scandinavian Airlines	direct
06 Dec - 08 Dec	Vueling Airlines
03 Dec - 07 Dec	Vueling Airlines
26 Dec - 29 Dec	SWISS
22 Dec - 02 Jan	Vueling Airlines
25 Dec - 02 Jan	Vueling Airlines
22 Dec - 26 Dec	Lufthansa
25 Dec - 29 Dec	Vueling Airlines
22 Dec - 29 Dec	Vueling Airlines
22 Dec - 31 Dec	Vueling Airlines
22 Dec - 30 Dec	Vueling Airlines
18 Dec - 22 Dec	Vueling Airlines

Also check the deals for one-way flights from Bilbao 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 Bilbao to Copenhagen in December from $152

Return flights