| Castro Valley to Beyne-Heusay | 5,559.41 mi (8,947.01 km) |
| Castro Valley to Bierbeek | 5,523.21 mi (8,888.76 km) |
| Castro Valley to Bilzen | 5,542.37 mi (8,919.58 km) |
| Castro Valley to Binche | 5,529.10 mi (8,898.22 km) |
| Castro Valley to Bissegem | 5,480.10 mi (8,819.37 km) |
| Castro Valley to Blankenberge | 5,452.10 mi (8,774.30 km) |
| Castro Valley to Blegny | 5,559.06 mi (8,946.43 km) |
| Castro Valley to Bocholt | 5,527.82 mi (8,896.16 km) |
| Castro Valley to Boechout | 5,498.54 mi (8,849.05 km) |
| Castro Valley to Bonheiden | 5,506.10 mi (8,861.21 km) |
| Castro Valley to Boom | 5,498.79 mi (8,849.44 km) |
| Castro Valley to Boortmeerbeek | 5,509.67 mi (8,866.96 km) |
| Castro Valley to Borgerhout | 5,494.10 mi (8,841.89 km) |
| Castro Valley to Borgloon | 5,540.99 mi (8,917.35 km) |
| Castro Valley to Bornem | 5,494.16 mi (8,841.99 km) |
