| Portchester to Bonhill | 382.41 mi (615.42 km) |
| Portchester to Bonnyrigg | 357.17 mi (574.81 km) |
| Portchester to Bootle | 196.56 mi (316.34 km) |
| Portchester to Borehamwood | 67.24 mi (108.21 km) |
| Portchester to Boscombe | 32.47 mi (52.26 km) |
| Portchester to Boston | 154.57 mi (248.75 km) |
| Portchester to Bottesford | 188.21 mi (302.89 km) |
| Portchester to Bourne | 136.83 mi (220.20 km) |
| Portchester to Bournemouth | 34.26 mi (55.13 km) |
| Portchester to Bournville | 115.15 mi (185.32 km) |
| Portchester to Bovingdon | 65.89 mi (106.04 km) |
| Portchester to Bowdon | 182.88 mi (294.32 km) |
| Portchester to Boxley | 78.89 mi (126.96 km) |
| Portchester to Brackley | 82.23 mi (132.34 km) |
| Portchester to Bracknell | 42.80 mi (68.88 km) |
