AirHint found the following cheapest return flights from Sofia (SOF) to Karlsruhe/Baden-Baden (FKB) in September 2025 (see full year).
Return flights
| 30 Sep - 14 Oct | Ryanair | direct | |
| 30 Sep - 11 Oct | Ryanair | direct | |
| 13 Sep - 30 Sep | Ryanair | direct | |
| 30 Sep - 30 Sep | Austrian Airlines |
Also check the deals for one-way flights from Sofia to Karlsruhe/Baden-Baden in September.
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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