| San Mateo to Sestu | 6,296.46 mi (10,133.18 km) |
| San Mateo to Settimo Torinese | 5,933.60 mi (9,549.20 km) |
| San Mateo to Seveso | 5,945.49 mi (9,568.34 km) |
| San Mateo to Sezze | 6,292.71 mi (10,127.13 km) |
| San Mateo to Siano | 6,379.48 mi (10,266.78 km) |
| San Mateo to Siena | 6,139.04 mi (9,879.83 km) |
| San Mateo to Signa | 6,106.09 mi (9,826.80 km) |
| San Mateo to Silea | 6,033.43 mi (9,709.86 km) |
| San Mateo to Silvi Paese | 6,261.94 mi (10,077.61 km) |
| San Mateo to Sinalunga | 6,156.36 mi (9,907.70 km) |
| San Mateo to Siniscola | 6,244.42 mi (10,049.43 km) |
| San Mateo to Sinnai | 6,299.82 mi (10,138.58 km) |
| San Mateo to Siracusa | 6,613.92 mi (10,644.08 km) |
| San Mateo to Solaro | 5,945.53 mi (9,568.40 km) |
| San Mateo to Soliera | 6,047.20 mi (9,732.03 km) |
