| Castro Valley to Borgosatollo | 5,969.98 mi (9,607.75 km) |
| Castro Valley to Borgosesia | 5,899.80 mi (9,494.81 km) |
| Castro Valley to Boscoreale | 6,359.23 mi (10,234.19 km) |
| Castro Valley to Boscotrecase | 6,357.79 mi (10,231.88 km) |
| Castro Valley to Botticino Sera | 5,966.59 mi (9,602.29 km) |
| Castro Valley to Bovalino Marina | 6,559.96 mi (10,557.24 km) |
| Castro Valley to Boves | 5,954.41 mi (9,582.70 km) |
| Castro Valley to Boville Ernica | 6,279.20 mi (10,105.40 km) |
| Castro Valley to Bovisio Masciago | 5,930.95 mi (9,544.94 km) |
| Castro Valley to Bovolone | 6,007.92 mi (9,668.81 km) |
| Castro Valley to Bra | 5,943.33 mi (9,564.87 km) |
| Castro Valley to Bracciano | 6,216.44 mi (10,004.40 km) |
| Castro Valley to Brandizzo | 5,916.85 mi (9,522.24 km) |
| Castro Valley to Breganze | 5,994.58 mi (9,647.34 km) |
| Castro Valley to Brembate | 5,943.38 mi (9,564.94 km) |
