| Watertown Town to Beyne-Heusay | 3,531.96 mi (5,684.14 km) |
| Watertown Town to Bierbeek | 3,490.53 mi (5,617.47 km) |
| Watertown Town to Bilzen | 3,520.00 mi (5,664.90 km) |
| Watertown Town to Binche | 3,477.22 mi (5,596.04 km) |
| Watertown Town to Bissegem | 3,427.94 mi (5,516.74 km) |
| Watertown Town to Blankenberge | 3,412.09 mi (5,491.22 km) |
| Watertown Town to Blegny | 3,534.01 mi (5,687.44 km) |
| Watertown Town to Bocholt | 3,514.58 mi (5,656.18 km) |
| Watertown Town to Boechout | 3,471.02 mi (5,586.07 km) |
| Watertown Town to Bonheiden | 3,475.99 mi (5,594.06 km) |
| Watertown Town to Boom | 3,467.99 mi (5,581.19 km) |
| Watertown Town to Boortmeerbeek | 3,478.61 mi (5,598.28 km) |
| Watertown Town to Borgerhout | 3,467.75 mi (5,580.81 km) |
| Watertown Town to Borgloon | 3,514.68 mi (5,656.33 km) |
| Watertown Town to Bornem | 3,462.18 mi (5,571.84 km) |
