| Grefrath to Borgosesia | 398.11 mi (640.70 km) |
| Grefrath to Boscoreale | 826.92 mi (1,330.81 km) |
| Grefrath to Boscotrecase | 825.52 mi (1,328.54 km) |
| Grefrath to Botticino Sera | 438.70 mi (706.03 km) |
| Grefrath to Bovalino Marina | 1,028.71 mi (1,655.55 km) |
| Grefrath to Boves | 487.08 mi (783.88 km) |
| Grefrath to Boville Ernica | 749.35 mi (1,205.97 km) |
| Grefrath to Bovisio Masciago | 415.52 mi (668.72 km) |
| Grefrath to Bovolone | 474.49 mi (763.62 km) |
| Grefrath to Bra | 463.77 mi (746.37 km) |
| Grefrath to Bracciano | 695.04 mi (1,118.57 km) |
| Grefrath to Brandizzo | 431.11 mi (693.80 km) |
| Grefrath to Breganze | 456.74 mi (735.05 km) |
| Grefrath to Brembate | 422.62 mi (680.14 km) |
| Grefrath to Brescia | 438.11 mi (705.06 km) |
