| Helensburgh to Solofra | 1,370.98 mi (2,206.38 km) |
| Helensburgh to Somma Lombardo | 920.34 mi (1,481.15 km) |
| Helensburgh to Somma Vesuviana | 1,356.86 mi (2,183.66 km) |
| Helensburgh to Sommacampagna | 996.98 mi (1,604.48 km) |
| Helensburgh to Sona | 994.66 mi (1,600.74 km) |
| Helensburgh to Sondrio | 926.07 mi (1,490.36 km) |
| Helensburgh to Sora | 1,284.74 mi (2,067.58 km) |
| Helensburgh to Sorbolo | 1,016.34 mi (1,635.65 km) |
| Helensburgh to Soresina | 974.84 mi (1,568.86 km) |
| Helensburgh to Sorisole | 943.86 mi (1,519.00 km) |
| Helensburgh to Sorrento | 1,369.26 mi (2,203.61 km) |
| Helensburgh to Sorso | 1,211.12 mi (1,949.11 km) |
| Helensburgh to Sortino | 1,593.01 mi (2,563.70 km) |
| Helensburgh to Soverato Marina | 1,544.75 mi (2,486.03 km) |
| Helensburgh to Sovicille | 1,127.58 mi (1,814.66 km) |
