| North Potomac to Beyne-Heusay | 3,920.60 mi (6,309.59 km) |
| North Potomac to Bierbeek | 3,879.18 mi (6,242.93 km) |
| North Potomac to Bilzen | 3,908.52 mi (6,290.16 km) |
| North Potomac to Binche | 3,866.14 mi (6,221.95 km) |
| North Potomac to Bissegem | 3,816.79 mi (6,142.52 km) |
| North Potomac to Blankenberge | 3,800.70 mi (6,116.63 km) |
| North Potomac to Blegny | 3,922.61 mi (6,312.83 km) |
| North Potomac to Bocholt | 3,902.92 mi (6,281.14 km) |
| North Potomac to Boechout | 3,859.53 mi (6,211.32 km) |
| North Potomac to Bonheiden | 3,864.56 mi (6,219.40 km) |
| North Potomac to Boom | 3,856.56 mi (6,206.53 km) |
| North Potomac to Boortmeerbeek | 3,867.20 mi (6,223.65 km) |
| North Potomac to Borgerhout | 3,856.23 mi (6,206.01 km) |
| North Potomac to Borgloon | 3,903.26 mi (6,281.69 km) |
| North Potomac to Bornem | 3,850.75 mi (6,197.19 km) |
