| Cities | Distance |
|---|---|
| Harpenden to Bonhill | 334.93 mi (539.01 km) |
| Harpenden to Bonnyrigg | 301.86 mi (485.79 km) |
| Harpenden to Bootle | 157.72 mi (253.82 km) |
| Harpenden to Borehamwood | 11.55 mi (18.59 km) |
| Harpenden to Boscombe | 99.16 mi (159.58 km) |
| Harpenden to Boston | 81.12 mi (130.54 km) |
| Harpenden to Bottesford | 120.59 mi (194.07 km) |
| Harpenden to Bourne | 65.71 mi (105.75 km) |
| Harpenden to Bournemouth | 100.55 mi (161.82 km) |
| Harpenden to Bournville | 79.37 mi (127.74 km) |
| Harpenden to Bovingdon | 10.23 mi (16.46 km) |
| Harpenden to Bowdon | 136.87 mi (220.27 km) |
| Harpenden to Boxley | 52.40 mi (84.33 km) |
| Harpenden to Brackley | 36.96 mi (59.48 km) |
| Harpenden to Bracknell | 32.54 mi (52.37 km) |