| Southborough to Solofra | 996.08 mi (1,603.04 km) |
| Southborough to Somma Lombardo | 540.43 mi (869.74 km) |
| Southborough to Somma Vesuviana | 980.37 mi (1,577.75 km) |
| Southborough to Sommacampagna | 627.63 mi (1,010.08 km) |
| Southborough to Sona | 625.47 mi (1,006.60 km) |
| Southborough to Sondrio | 556.90 mi (896.24 km) |
| Southborough to Sora | 908.26 mi (1,461.70 km) |
| Southborough to Sorbolo | 640.73 mi (1,031.16 km) |
| Southborough to Soresina | 598.80 mi (963.68 km) |
| Southborough to Sorisole | 569.82 mi (917.04 km) |
| Southborough to Sorrento | 991.56 mi (1,595.75 km) |
| Southborough to Sorso | 818.43 mi (1,317.14 km) |
| Southborough to Sortino | 1,207.84 mi (1,943.83 km) |
| Southborough to Soverato Marina | 1,168.63 mi (1,880.73 km) |
| Southborough to Sovicille | 747.50 mi (1,202.98 km) |
