| Portsmouth to Beyne-Heusay | 294.95 mi (474.68 km) |
| Portsmouth to Bierbeek | 255.47 mi (411.13 km) |
| Portsmouth to Bilzen | 288.10 mi (463.65 km) |
| Portsmouth to Binche | 232.05 mi (373.45 km) |
| Portsmouth to Bissegem | 187.88 mi (302.36 km) |
| Portsmouth to Blankenberge | 185.72 mi (298.89 km) |
| Portsmouth to Blegny | 298.30 mi (480.07 km) |
| Portsmouth to Bocholt | 290.95 mi (468.23 km) |
| Portsmouth to Boechout | 243.44 mi (391.77 km) |
| Portsmouth to Bonheiden | 245.26 mi (394.70 km) |
| Portsmouth to Boom | 238.15 mi (383.26 km) |
| Portsmouth to Boortmeerbeek | 246.64 mi (396.94 km) |
| Portsmouth to Borgerhout | 241.89 mi (389.28 km) |
| Portsmouth to Borgloon | 280.70 mi (451.74 km) |
| Portsmouth to Bornem | 232.42 mi (374.04 km) |
