| Southborough to Bougival | 179.05 mi (288.16 km) |
| Southborough to Bouguenais | 288.02 mi (463.53 km) |
| Southborough to Boulogne-Billancourt | 183.01 mi (294.52 km) |
| Southborough to Boulogne-sur-Mer | 65.94 mi (106.12 km) |
| Southborough to Bourg-de-Peage | 476.90 mi (767.49 km) |
| Southborough to Bourg-en-Bresse | 410.20 mi (660.16 km) |
| Southborough to Bourg-la-Reine | 187.98 mi (302.53 km) |
| Southborough to Bourg-les-Valence | 479.31 mi (771.38 km) |
| Southborough to Bourges | 297.58 mi (478.91 km) |
| Southborough to Bourgoin-Jallieu | 448.25 mi (721.39 km) |
| Southborough to Bressuire | 300.41 mi (483.47 km) |
| Southborough to Brest | 285.63 mi (459.67 km) |
| Southborough to Bretigny-sur-Orge | 198.11 mi (318.83 km) |
| Southborough to Breuillet | 198.28 mi (319.11 km) |
| Southborough to Briancon | 522.96 mi (841.63 km) |
