| Sankt Gallen to Sestu | 561.54 mi (903.72 km) |
| Sankt Gallen to Settimo Torinese | 175.84 mi (282.98 km) |
| Sankt Gallen to Seveso | 123.54 mi (198.82 km) |
| Sankt Gallen to Sezze | 447.93 mi (720.87 km) |
| Sankt Gallen to Siano | 527.96 mi (849.67 km) |
| Sankt Gallen to Siena | 299.20 mi (481.51 km) |
| Sankt Gallen to Signa | 265.07 mi (426.58 km) |
| Sankt Gallen to Silea | 185.14 mi (297.95 km) |
| Sankt Gallen to Silvi Paese | 408.73 mi (657.78 km) |
| Sankt Gallen to Sinalunga | 312.51 mi (502.93 km) |
| Sankt Gallen to Siniscola | 473.56 mi (762.12 km) |
| Sankt Gallen to Sinnai | 561.21 mi (903.18 km) |
| Sankt Gallen to Siracusa | 776.25 mi (1,249.25 km) |
| Sankt Gallen to Solaro | 125.75 mi (202.37 km) |
| Sankt Gallen to Soliera | 199.96 mi (321.81 km) |
