| Harrow Weald to Bonhill | 348.16 mi (560.31 km) |
| Harrow Weald to Bonnyrigg | 315.89 mi (508.38 km) |
| Harrow Weald to Bootle | 169.10 mi (272.14 km) |
| Harrow Weald to Borehamwood | 4.69 mi (7.55 km) |
| Harrow Weald to Boscombe | 88.98 mi (143.20 km) |
| Harrow Weald to Boston | 95.60 mi (153.86 km) |
| Harrow Weald to Bottesford | 135.32 mi (217.78 km) |
| Harrow Weald to Bourne | 80.47 mi (129.50 km) |
| Harrow Weald to Bournemouth | 90.49 mi (145.63 km) |
| Harrow Weald to Bournville | 88.68 mi (142.72 km) |
| Harrow Weald to Bovingdon | 11.81 mi (19.01 km) |
| Harrow Weald to Bowdon | 149.19 mi (240.10 km) |
| Harrow Weald to Boxley | 43.31 mi (69.71 km) |
| Harrow Weald to Brackley | 45.45 mi (73.14 km) |
| Harrow Weald to Bracknell | 21.90 mi (35.24 km) |
