| Sankt Gallen to Solofra | 529.98 mi (852.92 km) |
| Sankt Gallen to Somma Lombardo | 124.43 mi (200.26 km) |
| Sankt Gallen to Somma Vesuviana | 517.41 mi (832.70 km) |
| Sankt Gallen to Sommacampagna | 156.60 mi (252.02 km) |
| Sankt Gallen to Sona | 154.18 mi (248.13 km) |
| Sankt Gallen to Sondrio | 89.84 mi (144.58 km) |
| Sankt Gallen to Sora | 446.14 mi (717.99 km) |
| Sankt Gallen to Sorbolo | 185.44 mi (298.43 km) |
| Sankt Gallen to Soresina | 149.51 mi (240.61 km) |
| Sankt Gallen to Sorisole | 117.33 mi (188.82 km) |
| Sankt Gallen to Sorrento | 531.02 mi (854.60 km) |
| Sankt Gallen to Sorso | 459.49 mi (739.47 km) |
| Sankt Gallen to Sortino | 765.00 mi (1,231.15 km) |
| Sankt Gallen to Soverato Marina | 703.64 mi (1,132.40 km) |
| Sankt Gallen to Sovicille | 300.04 mi (482.86 km) |
