| Harrow Weald to Ayr | 319.16 mi (513.64 km) |
| Harrow Weald to Bacup | 164.70 mi (265.06 km) |
| Harrow Weald to Baguley | 148.38 mi (238.79 km) |
| Harrow Weald to Baildon | 166.29 mi (267.61 km) |
| Harrow Weald to Bailleston | 331.22 mi (533.05 km) |
| Harrow Weald to Balderton | 101.91 mi (164.00 km) |
| Harrow Weald to Baldock | 27.42 mi (44.13 km) |
| Harrow Weald to Balham | 13.69 mi (22.03 km) |
| Harrow Weald to Bamber Bridge | 176.05 mi (283.33 km) |
| Harrow Weald to Banbridge | 310.48 mi (499.67 km) |
| Harrow Weald to Banbury | 53.00 mi (85.30 km) |
| Harrow Weald to Bangor | 305.49 mi (491.64 km) |
| Harrow Weald to Bangor | 195.12 mi (314.01 km) |
| Harrow Weald to Banstead | 20.33 mi (32.72 km) |
| Harrow Weald to Bargoed | 124.51 mi (200.38 km) |
