| Potomac to Beyne-Heusay | 3,922.56 mi (6,312.75 km) |
| Potomac to Bierbeek | 3,881.14 mi (6,246.09 km) |
| Potomac to Bilzen | 3,910.51 mi (6,293.36 km) |
| Potomac to Binche | 3,868.04 mi (6,225.01 km) |
| Potomac to Bissegem | 3,818.70 mi (6,145.61 km) |
| Potomac to Blankenberge | 3,802.67 mi (6,119.80 km) |
| Potomac to Blegny | 3,924.58 mi (6,316.01 km) |
| Potomac to Bocholt | 3,904.94 mi (6,284.40 km) |
| Potomac to Boechout | 3,861.52 mi (6,214.52 km) |
| Potomac to Bonheiden | 3,866.54 mi (6,222.59 km) |
| Potomac to Boom | 3,858.54 mi (6,209.71 km) |
| Potomac to Boortmeerbeek | 3,869.17 mi (6,226.83 km) |
| Potomac to Borgerhout | 3,858.23 mi (6,209.22 km) |
| Potomac to Borgloon | 3,905.24 mi (6,284.87 km) |
| Potomac to Bornem | 3,852.73 mi (6,200.37 km) |
