| Karlsruhe to Bistrita | 752.86 mi (1,211.61 km) |
| Karlsruhe to Blaj | 747.30 mi (1,202.66 km) |
| Karlsruhe to Bocsa | 672.21 mi (1,081.82 km) |
| Karlsruhe to Boldesti-Scaeni | 872.22 mi (1,403.70 km) |
| Karlsruhe to Bolintin Vale | 877.78 mi (1,412.65 km) |
| Karlsruhe to Borsa | 751.21 mi (1,208.95 km) |
| Karlsruhe to Botosani | 840.69 mi (1,352.95 km) |
| Karlsruhe to Brad | 698.30 mi (1,123.80 km) |
| Karlsruhe to Bragadiru | 889.75 mi (1,431.92 km) |
| Karlsruhe to Braila | 951.60 mi (1,531.46 km) |
| Karlsruhe to Brasov | 836.30 mi (1,345.90 km) |
| Karlsruhe to Breaza | 851.40 mi (1,370.19 km) |
| Karlsruhe to Bucharest | 893.47 mi (1,437.90 km) |
| Karlsruhe to Buftea | 882.42 mi (1,420.12 km) |
| Karlsruhe to Buhusi | 860.79 mi (1,385.30 km) |
