| Castano Primo to Bistrita | 757.07 mi (1,218.38 km) |
| Castano Primo to Blaj | 729.01 mi (1,173.22 km) |
| Castano Primo to Bocsa | 626.70 mi (1,008.58 km) |
| Castano Primo to Boldesti-Scaeni | 838.29 mi (1,349.10 km) |
| Castano Primo to Bolintin Vale | 832.03 mi (1,339.03 km) |
| Castano Primo to Borsa | 767.07 mi (1,234.47 km) |
| Castano Primo to Botosani | 860.58 mi (1,384.96 km) |
| Castano Primo to Brad | 675.32 mi (1,086.82 km) |
| Castano Primo to Bragadiru | 843.61 mi (1,357.67 km) |
| Castano Primo to Braila | 928.85 mi (1,494.83 km) |
| Castano Primo to Brasov | 812.98 mi (1,308.36 km) |
| Castano Primo to Breaza | 818.99 mi (1,318.04 km) |
| Castano Primo to Bucharest | 849.00 mi (1,366.34 km) |
| Castano Primo to Buftea | 839.75 mi (1,351.44 km) |
| Castano Primo to Buhusi | 860.75 mi (1,385.24 km) |
