| Portchester to Bitonto | 1,082.49 mi (1,742.09 km) |
| Portchester to Bitritto | 1,091.29 mi (1,756.27 km) |
| Portchester to Bollate | 595.73 mi (958.74 km) |
| Portchester to Bologna | 725.49 mi (1,167.56 km) |
| Portchester to Bolzano | 642.34 mi (1,033.75 km) |
| Portchester to Bomporto | 703.13 mi (1,131.58 km) |
| Portchester to Bonate di Sopra | 606.22 mi (975.61 km) |
| Portchester to Bondeno | 710.68 mi (1,143.73 km) |
| Portchester to Bordighera | 637.29 mi (1,025.62 km) |
| Portchester to Borgaro Torinese | 564.16 mi (907.93 km) |
| Portchester to Borgo a Buggiano | 732.53 mi (1,178.89 km) |
| Portchester to Borgo San Dalmazzo | 601.68 mi (968.30 km) |
| Portchester to Borgo San Lorenzo | 752.42 mi (1,210.90 km) |
| Portchester to Borgomanero | 565.44 mi (909.99 km) |
| Portchester to Borgoricco | 704.82 mi (1,134.31 km) |
