| Harpenden to Beyne-Heusay | 272.61 mi (438.72 km) |
| Harpenden to Bierbeek | 231.19 mi (372.06 km) |
| Harpenden to Bilzen | 261.61 mi (421.02 km) |
| Harpenden to Binche | 219.09 mi (352.59 km) |
| Harpenden to Bissegem | 168.90 mi (271.83 km) |
| Harpenden to Blankenberge | 153.23 mi (246.60 km) |
| Harpenden to Blegny | 274.88 mi (442.38 km) |
| Harpenden to Bocholt | 258.95 mi (416.75 km) |
| Harpenden to Boechout | 213.07 mi (342.91 km) |
| Harpenden to Bonheiden | 217.30 mi (349.71 km) |
| Harpenden to Boom | 209.39 mi (336.98 km) |
| Harpenden to Boortmeerbeek | 219.69 mi (353.55 km) |
| Harpenden to Borgerhout | 210.26 mi (338.38 km) |
| Harpenden to Borgloon | 255.73 mi (411.56 km) |
| Harpenden to Bornem | 203.51 mi (327.51 km) |
