| Southborough to Benisa | 859.95 mi (1,383.95 km) |
| Southborough to Berga | 630.41 mi (1,014.54 km) |
| Southborough to Berja | 1,001.58 mi (1,611.89 km) |
| Southborough to Bermeo | 552.72 mi (889.51 km) |
| Southborough to Berriozar | 582.25 mi (937.04 km) |
| Southborough to Betanzos | 673.35 mi (1,083.65 km) |
| Southborough to Betera | 800.01 mi (1,287.50 km) |
| Southborough to Bilbao | 566.04 mi (910.95 km) |
| Southborough to Binefar | 643.25 mi (1,035.21 km) |
| Southborough to Binisalem | 802.55 mi (1,291.58 km) |
| Southborough to Blanes | 666.26 mi (1,072.24 km) |
| Southborough to Boadilla del Monte | 768.95 mi (1,237.50 km) |
| Southborough to Boiro | 728.80 mi (1,172.89 km) |
| Southborough to Bolanos de Calatrava | 869.91 mi (1,399.98 km) |
| Southborough to Bollullos de la Mitacion | 1,005.48 mi (1,618.17 km) |
