| Helensburgh to Sestu | 1,316.58 mi (2,118.83 km) |
| Helensburgh to Settimo Torinese | 927.71 mi (1,493.01 km) |
| Helensburgh to Seveso | 934.61 mi (1,504.12 km) |
| Helensburgh to Sezze | 1,281.82 mi (2,062.90 km) |
| Helensburgh to Siano | 1,368.28 mi (2,202.03 km) |
| Helensburgh to Siena | 1,128.26 mi (1,815.76 km) |
| Helensburgh to Signa | 1,095.10 mi (1,762.39 km) |
| Helensburgh to Silea | 1,026.66 mi (1,652.25 km) |
| Helensburgh to Silvi Paese | 1,251.79 mi (2,014.56 km) |
| Helensburgh to Sinalunga | 1,145.29 mi (1,843.16 km) |
| Helensburgh to Siniscola | 1,250.71 mi (2,012.82 km) |
| Helensburgh to Sinnai | 1,318.82 mi (2,122.43 km) |
| Helensburgh to Siracusa | 1,605.68 mi (2,584.09 km) |
| Helensburgh to Solaro | 934.75 mi (1,504.33 km) |
| Helensburgh to Soliera | 1,035.97 mi (1,667.23 km) |
