| Portsmouth to Bonhill | 385.25 mi (620.00 km) |
| Portsmouth to Bonnyrigg | 359.92 mi (579.24 km) |
| Portsmouth to Bootle | 199.43 mi (320.95 km) |
| Portsmouth to Borehamwood | 68.62 mi (110.43 km) |
| Portsmouth to Boscombe | 33.37 mi (53.70 km) |
| Portsmouth to Boston | 156.55 mi (251.94 km) |
| Portsmouth to Bottesford | 190.57 mi (306.69 km) |
| Portsmouth to Bourne | 138.95 mi (223.62 km) |
| Portsmouth to Bournemouth | 35.15 mi (56.57 km) |
| Portsmouth to Bournville | 117.97 mi (189.85 km) |
| Portsmouth to Bovingdon | 67.70 mi (108.95 km) |
| Portsmouth to Bowdon | 185.69 mi (298.84 km) |
| Portsmouth to Boxley | 78.67 mi (126.61 km) |
| Portsmouth to Brackley | 84.76 mi (136.41 km) |
| Portsmouth to Bracknell | 44.64 mi (71.84 km) |
