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

Return flights

08 Dec - 10 Dec	airBaltic
06 Dec - 09 Dec	airBaltic
03 Dec - 05 Dec	airBaltic
08 Dec - 10 Dec	Scandinavian Airlines	direct
03 Dec - 05 Dec	Scandinavian Airlines	direct
03 Dec - 12 Dec	Norwegian Air Sweden AOC
08 Dec - 12 Dec	Norwegian Air Sweden AOC
03 Dec - 07 Dec	Norwegian Air Sweden AOC
05 Dec - 12 Dec	Norwegian Air Sweden AOC
17 Dec - 28 Dec	Norwegian Air Sweden AOC

Also check the deals for one-way flights from Helsinki 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 Helsinki to Copenhagen in December from 119€

Return flights