| Castro Valley to Barberino di Mugello | 6,081.39 mi (9,787.06 km) |
| Castro Valley to Barcellona-Pozzo di Gotto | 6,532.42 mi (10,512.91 km) |
| Castro Valley to Bareggio | 5,934.44 mi (9,550.56 km) |
| Castro Valley to Barga | 6,055.44 mi (9,745.29 km) |
| Castro Valley to Bari | 6,404.49 mi (10,307.03 km) |
| Castro Valley to Barletta | 6,377.35 mi (10,263.36 km) |
| Castro Valley to Baronissi | 6,368.58 mi (10,249.24 km) |
| Castro Valley to Barrafranca | 6,547.65 mi (10,537.42 km) |
| Castro Valley to Bassano del Grappa | 5,995.43 mi (9,648.71 km) |
| Castro Valley to Battipaglia | 6,382.13 mi (10,271.05 km) |
| Castro Valley to Beinasco | 5,918.03 mi (9,524.14 km) |
| Castro Valley to Bellinzago Novarese | 5,917.83 mi (9,523.83 km) |
| Castro Valley to Belluno | 5,987.42 mi (9,635.81 km) |
| Castro Valley to Belmonte Mezzagno | 6,483.63 mi (10,434.39 km) |
| Castro Valley to Belpasso | 6,558.51 mi (10,554.90 km) |
