| Portsmouth to Blumberg | 478.85 mi (770.63 km) |
| Portsmouth to Bobenheim-Roxheim | 426.04 mi (685.65 km) |
| Portsmouth to Bobingen | 561.11 mi (903.02 km) |
| Portsmouth to Boblingen | 473.79 mi (762.48 km) |
| Portsmouth to Bocholt | 339.98 mi (547.15 km) |
| Portsmouth to Bochum | 362.73 mi (583.75 km) |
| Portsmouth to Bockenem | 490.13 mi (788.78 km) |
| Portsmouth to Bockhorn | 425.52 mi (684.80 km) |
| Portsmouth to Bogen | 626.09 mi (1,007.59 km) |
| Portsmouth to Bohl-Iggelheim | 427.82 mi (688.52 km) |
| Portsmouth to Bohmte | 417.53 mi (671.95 km) |
| Portsmouth to Boizenburg | 530.71 mi (854.10 km) |
| Portsmouth to Bonen | 386.63 mi (622.22 km) |
| Portsmouth to Bonn | 357.61 mi (575.52 km) |
| Portsmouth to Bopfingen | 526.71 mi (847.66 km) |
