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

Return flights

03 Dec - 06 Dec	Ryanair	direct
03 Dec - 08 Dec	Ryanair	direct
04 Dec - 08 Dec	Ryanair	direct
05 Dec - 08 Dec	airBaltic
04 Dec - 07 Dec	Wizz Air
03 Dec - 15 Dec	Ryanair	direct
04 Dec - 15 Dec	Ryanair	direct
03 Dec - 24 Dec	Ryanair	direct
17 Dec - 24 Dec	Ryanair	direct
13 Dec - 16 Dec	Ryanair
17 Dec - 03 Jan	Ryanair	direct
17 Dec - 01 Jan	Ryanair	direct
27 Dec - 05 Jan	Air Serbia
17 Dec - 05 Jan	Ryanair	direct
24 Dec - 03 Jan	Air Serbia
26 Dec - 05 Jan	Air Serbia
20 Dec - 05 Jan	Air Serbia
20 Dec - 03 Jan	Ryanair	direct
20 Dec - 01 Jan	Ryanair	direct
24 Dec - 03 Jan	Ryanair	direct

Also check the deals for one-way flights from Sofia 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 Sofia to Copenhagen in December from $112

Return flights