| South Portland to Bitonto | 4,224.94 mi (6,799.38 km) |
| South Portland to Bitritto | 4,233.99 mi (6,813.94 km) |
| South Portland to Bollate | 3,740.95 mi (6,020.48 km) |
| South Portland to Bologna | 3,871.49 mi (6,230.56 km) |
| South Portland to Bolzano | 3,803.38 mi (6,120.94 km) |
| South Portland to Bomporto | 3,850.02 mi (6,196.01 km) |
| South Portland to Bonate di Sopra | 3,755.61 mi (6,044.07 km) |
| South Portland to Bondeno | 3,861.10 mi (6,213.83 km) |
| South Portland to Bordighera | 3,737.43 mi (6,014.82 km) |
| South Portland to Borgaro Torinese | 3,691.45 mi (5,940.82 km) |
| South Portland to Borgo a Buggiano | 3,866.74 mi (6,222.91 km) |
| South Portland to Borgo San Dalmazzo | 3,711.11 mi (5,972.46 km) |
| South Portland to Borgo San Lorenzo | 3,892.27 mi (6,264.01 km) |
| South Portland to Borgomanero | 3,708.40 mi (5,968.09 km) |
| South Portland to Borgoricco | 3,862.36 mi (6,215.87 km) |
