| Castro Valley to Belvedere Marittimo | 6,465.48 mi (10,405.18 km) |
| Castro Valley to Benevento | 6,346.45 mi (10,213.63 km) |
| Castro Valley to Bergamo | 5,941.52 mi (9,561.95 km) |
| Castro Valley to Bernalda | 6,441.26 mi (10,366.21 km) |
| Castro Valley to Bertinoro | 6,098.35 mi (9,814.34 km) |
| Castro Valley to Besana in Brianza | 5,930.16 mi (9,543.68 km) |
| Castro Valley to Besozzo | 5,904.08 mi (9,501.70 km) |
| Castro Valley to Biancavilla | 6,551.18 mi (10,543.10 km) |
| Castro Valley to Biassono | 5,933.39 mi (9,548.87 km) |
| Castro Valley to Bibbiano | 6,021.81 mi (9,691.16 km) |
| Castro Valley to Bibbiena | 6,114.95 mi (9,841.07 km) |
| Castro Valley to Biella | 5,902.19 mi (9,498.65 km) |
| Castro Valley to Bisceglie | 6,387.73 mi (10,280.06 km) |
| Castro Valley to Bisignano | 6,483.08 mi (10,433.51 km) |
| Castro Valley to Bitetto | 6,406.75 mi (10,310.66 km) |
