| South Portland to Borgosatollo | 3,791.03 mi (6,101.07 km) |
| South Portland to Borgosesia | 3,699.34 mi (5,953.52 km) |
| South Portland to Boscoreale | 4,143.28 mi (6,667.97 km) |
| South Portland to Boscotrecase | 4,141.92 mi (6,665.78 km) |
| South Portland to Botticino Sera | 3,788.82 mi (6,097.52 km) |
| South Portland to Bovalino Marina | 4,319.81 mi (6,952.06 km) |
| South Portland to Boves | 3,714.01 mi (5,977.12 km) |
| South Portland to Boville Ernica | 4,065.64 mi (6,543.02 km) |
| South Portland to Bovisio Masciago | 3,740.16 mi (6,019.20 km) |
| South Portland to Bovolone | 3,836.47 mi (6,174.20 km) |
| South Portland to Bra | 3,714.84 mi (5,978.46 km) |
| South Portland to Bracciano | 3,993.24 mi (6,426.49 km) |
| South Portland to Brandizzo | 3,698.65 mi (5,952.41 km) |
| South Portland to Breganze | 3,839.29 mi (6,178.74 km) |
| South Portland to Brembate | 3,757.67 mi (6,047.39 km) |
