| Harpenden to Brownhills | 88.08 mi (141.75 km) |
| Harpenden to Broxbourne | 14.90 mi (23.98 km) |
| Harpenden to Broxburn | 311.42 mi (501.19 km) |
| Harpenden to Bryn | 151.07 mi (243.12 km) |
| Harpenden to Buckhurst Hill | 20.99 mi (33.78 km) |
| Harpenden to Buckie | 417.90 mi (672.54 km) |
| Harpenden to Buckingham | 29.66 mi (47.74 km) |
| Harpenden to Buckley | 148.24 mi (238.58 km) |
| Harpenden to Bucksburn | 377.42 mi (607.40 km) |
| Harpenden to Bude | 193.46 mi (311.34 km) |
| Harpenden to Bulwell | 89.18 mi (143.53 km) |
| Harpenden to Burbage | 64.72 mi (104.16 km) |
| Harpenden to Burgess Hill | 60.49 mi (97.35 km) |
| Harpenden to Burnham | 23.27 mi (37.44 km) |
| Harpenden to Burnham-on-Sea | 120.38 mi (193.74 km) |
