AirHint found the following cheapest return flights from Karlsruhe/Baden-Baden (FKB) to Sofia (SOF) in December 2025 (see full year).
Return flights
| 28 Dec - 29 Dec | Ryanair | direct | |
| 28 Dec - 08 Jan | Ryanair | direct | |
| 28 Dec - 11 Jan | Ryanair | direct | |
| 28 Dec - 12 Jan | Ryanair | direct | |
| 28 Dec - 28 Dec | 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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