| Sierpc to Sestu | 1,064.03 mi (1,712.39 km) |
| Sierpc to Settimo Torinese | 758.16 mi (1,220.14 km) |
| Sierpc to Seveso | 688.29 mi (1,107.70 km) |
| Sierpc to Sezze | 844.48 mi (1,359.06 km) |
| Sierpc to Siano | 866.62 mi (1,394.69 km) |
| Sierpc to Siena | 763.49 mi (1,228.71 km) |
| Sierpc to Signa | 740.57 mi (1,191.83 km) |
| Sierpc to Silea | 599.19 mi (964.30 km) |
| Sierpc to Silvi Paese | 758.58 mi (1,220.81 km) |
| Sierpc to Sinalunga | 760.74 mi (1,224.30 km) |
| Sierpc to Siniscola | 970.67 mi (1,562.14 km) |
| Sierpc to Sinnai | 1,061.36 mi (1,708.09 km) |
| Sierpc to Siracusa | 1,112.89 mi (1,791.02 km) |
| Sierpc to Solaro | 691.45 mi (1,112.78 km) |
| Sierpc to Soliera | 688.09 mi (1,107.37 km) |
