| Portsmouth to Bitonto | 1,079.96 mi (1,738.03 km) |
| Portsmouth to Bitritto | 1,088.77 mi (1,752.21 km) |
| Portsmouth to Bollate | 593.15 mi (954.58 km) |
| Portsmouth to Bologna | 722.94 mi (1,163.46 km) |
| Portsmouth to Bolzano | 640.05 mi (1,030.06 km) |
| Portsmouth to Bomporto | 700.59 mi (1,127.49 km) |
| Portsmouth to Bonate di Sopra | 603.68 mi (971.53 km) |
| Portsmouth to Bondeno | 708.18 mi (1,139.70 km) |
| Portsmouth to Bordighera | 634.49 mi (1,021.11 km) |
| Portsmouth to Borgaro Torinese | 561.44 mi (903.56 km) |
| Portsmouth to Borgo a Buggiano | 729.89 mi (1,174.65 km) |
| Portsmouth to Borgo San Dalmazzo | 598.90 mi (963.83 km) |
| Portsmouth to Borgo San Lorenzo | 749.82 mi (1,206.72 km) |
| Portsmouth to Borgomanero | 562.83 mi (905.79 km) |
| Portsmouth to Borgoricco | 702.43 mi (1,130.46 km) |
