AirHint found the following cheapest return flights from Karlsruhe/Baden-Baden (FKB) to Sofia (SOF) in December 2025 (see full year).

Return flights

27 Dec - 30 Dec	Ryanair	direct
27 Dec - 01 Jan	Ryanair	direct
29 Dec - 03 Jan	Ryanair	direct
18 Dec - 06 Jan	Ryanair
22 Dec - 11 Jan	Ryanair	direct
23 Dec - 11 Jan	Ryanair
23 Dec - 11 Jan	Ryanair	direct

Also check the deals for one-way flights from Karlsruhe/Baden-Baden to Sofia 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 Karlsruhe/Baden-Baden to Sofia in December from 107€

Return flights