| Southborough to Barberino di Mugello | 710.09 mi (1,142.77 km) |
| Southborough to Barcellona-Pozzo di Gotto | 1,156.45 mi (1,861.12 km) |
| Southborough to Bareggio | 560.72 mi (902.39 km) |
| Southborough to Barga | 681.45 mi (1,096.69 km) |
| Southborough to Bari | 1,050.31 mi (1,690.31 km) |
| Southborough to Barletta | 1,019.97 mi (1,641.49 km) |
| Southborough to Baronissi | 998.12 mi (1,606.32 km) |
| Southborough to Barrafranca | 1,172.02 mi (1,886.18 km) |
| Southborough to Bassano del Grappa | 643.01 mi (1,034.82 km) |
| Southborough to Battipaglia | 1,012.09 mi (1,628.80 km) |
| Southborough to Beinasco | 541.88 mi (872.07 km) |
| Southborough to Bellinzago Novarese | 543.39 mi (874.50 km) |
| Southborough to Belluno | 645.27 mi (1,038.45 km) |
| Southborough to Belmonte Mezzagno | 1,108.54 mi (1,784.02 km) |
| Southborough to Belpasso | 1,182.08 mi (1,902.37 km) |
