| Portchester to Ayr | 350.41 mi (563.92 km) |
| Portchester to Bacup | 202.93 mi (326.59 km) |
| Portchester to Baguley | 183.35 mi (295.07 km) |
| Portchester to Baildon | 209.66 mi (337.42 km) |
| Portchester to Bailleston | 367.15 mi (590.87 km) |
| Portchester to Balderton | 153.61 mi (247.21 km) |
| Portchester to Baldock | 88.87 mi (143.02 km) |
| Portchester to Balham | 59.04 mi (95.01 km) |
| Portchester to Bamber Bridge | 209.76 mi (337.57 km) |
| Portchester to Banbridge | 323.96 mi (521.36 km) |
| Portchester to Banbury | 84.74 mi (136.37 km) |
| Portchester to Bangor | 325.12 mi (523.23 km) |
| Portchester to Bangor | 208.59 mi (335.69 km) |
| Portchester to Banstead | 51.77 mi (83.32 km) |
| Portchester to Bargoed | 108.77 mi (175.05 km) |
