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

Return flights

07 Dec - 28 Dec	Ryanair	direct
11 Dec - 28 Dec	Ryanair	direct
12 Dec - 28 Dec	Ryanair	direct
26 Dec - 28 Dec	Ryanair	direct
07 Dec - 22 Dec	Ryanair	direct
11 Dec - 22 Dec	Ryanair	direct
12 Dec - 22 Dec	Ryanair	direct
07 Dec - 21 Dec	Ryanair	direct
11 Dec - 21 Dec	Ryanair	direct
12 Dec - 21 Dec	Ryanair	direct

Also check the deals for one-way flights from Sofia to Cologne 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 Cologne in December from $130

Return flights