| Castricum to Bistrita | 955.76 mi (1,538.14 km) |
| Castricum to Blaj | 967.55 mi (1,557.12 km) |
| Castricum to Bocsa | 914.98 mi (1,472.52 km) |
| Castricum to Boldesti-Scaeni | 1,096.70 mi (1,764.98 km) |
| Castricum to Bolintin Vale | 1,110.13 mi (1,786.59 km) |
| Castricum to Borsa | 944.71 mi (1,520.36 km) |
| Castricum to Botosani | 1,024.30 mi (1,648.45 km) |
| Castricum to Brad | 925.07 mi (1,488.76 km) |
| Castricum to Bragadiru | 1,121.86 mi (1,805.47 km) |
| Castricum to Braila | 1,164.27 mi (1,873.70 km) |
| Castricum to Brasov | 1,054.97 mi (1,697.81 km) |
| Castricum to Breaza | 1,075.81 mi (1,731.34 km) |
| Castricum to Bucharest | 1,124.30 mi (1,809.38 km) |
| Castricum to Buftea | 1,112.50 mi (1,790.40 km) |
| Castricum to Buhusi | 1,060.10 mi (1,706.07 km) |
