| Portici to Borgosatollo | 382.30 mi (615.25 km) |
| Portici to Borgosesia | 455.66 mi (733.31 km) |
| Portici to Boscoreale | 8.29 mi (13.34 km) |
| Portici to Boscotrecase | 7.03 mi (11.32 km) |
| Portici to Botticino Sera | 385.76 mi (620.82 km) |
| Portici to Bovalino Marina | 208.56 mi (335.64 km) |
| Portici to Boves | 422.05 mi (679.22 km) |
| Portici to Boville Ernica | 73.18 mi (117.77 km) |
| Portici to Bovisio Masciago | 421.91 mi (678.99 km) |
| Portici to Bovolone | 346.26 mi (557.25 km) |
| Portici to Bra | 424.39 mi (682.99 km) |
| Portici to Bracciano | 142.50 mi (229.33 km) |
| Portici to Brandizzo | 445.39 mi (716.78 km) |
| Portici to Breganze | 364.89 mi (587.23 km) |
| Portici to Brembate | 408.86 mi (657.99 km) |
