| San Marcos to Sestu | 6,365.34 mi (10,244.02 km) |
| San Marcos to Settimo Torinese | 6,024.04 mi (9,694.76 km) |
| San Marcos to Seveso | 6,043.57 mi (9,726.18 km) |
| San Marcos to Sezze | 6,388.49 mi (10,281.28 km) |
| San Marcos to Siano | 6,479.37 mi (10,427.54 km) |
| San Marcos to Siena | 6,235.44 mi (10,034.97 km) |
| San Marcos to Signa | 6,203.60 mi (9,983.72 km) |
| San Marcos to Silea | 6,143.86 mi (9,887.59 km) |
| San Marcos to Silvi Paese | 6,366.64 mi (10,246.12 km) |
| San Marcos to Sinalunga | 6,253.97 mi (10,064.79 km) |
| San Marcos to Siniscola | 6,321.73 mi (10,173.84 km) |
| San Marcos to Sinnai | 6,369.19 mi (10,250.23 km) |
| San Marcos to Siracusa | 6,700.91 mi (10,784.08 km) |
| San Marcos to Solaro | 6,043.27 mi (9,725.70 km) |
| San Marcos to Soliera | 6,148.22 mi (9,894.60 km) |
