| Harpenden to Belper | 96.14 mi (154.73 km) |
| Harpenden to Bentley | 124.28 mi (200.00 km) |
| Harpenden to Berkhampstead | 9.72 mi (15.65 km) |
| Harpenden to Berwick-Upon-Tweed | 281.20 mi (452.54 km) |
| Harpenden to Beverley | 140.12 mi (225.50 km) |
| Harpenden to Bewdley | 91.80 mi (147.74 km) |
| Harpenden to Bexleyheath | 32.49 mi (52.29 km) |
| Harpenden to Bicester | 34.51 mi (55.54 km) |
| Harpenden to Bickenhill | 72.34 mi (116.42 km) |
| Harpenden to Bickley | 33.53 mi (53.96 km) |
| Harpenden to Biddulph | 118.11 mi (190.08 km) |
| Harpenden to Bideford | 175.14 mi (281.86 km) |
| Harpenden to Bidston | 158.29 mi (254.75 km) |
| Harpenden to Biggleswade | 18.97 mi (30.53 km) |
| Harpenden to Billericay | 35.49 mi (57.12 km) |
