| Webster Groves to Sestu | 5,029.79 mi (8,094.66 km) |
| Webster Groves to Settimo Torinese | 4,742.91 mi (7,632.97 km) |
| Webster Groves to Seveso | 4,778.21 mi (7,689.78 km) |
| Webster Groves to Sezze | 5,105.68 mi (8,216.80 km) |
| Webster Groves to Siano | 5,202.03 mi (8,371.86 km) |
| Webster Groves to Siena | 4,959.38 mi (7,981.35 km) |
| Webster Groves to Signa | 4,931.06 mi (7,935.77 km) |
| Webster Groves to Silea | 4,902.27 mi (7,889.45 km) |
| Webster Groves to Silvi Paese | 5,103.72 mi (8,213.65 km) |
| Webster Groves to Sinalunga | 4,979.82 mi (8,014.24 km) |
| Webster Groves to Siniscola | 5,003.66 mi (8,052.61 km) |
| Webster Groves to Sinnai | 5,034.46 mi (8,102.18 km) |
| Webster Groves to Siracusa | 5,389.78 mi (8,674.01 km) |
| Webster Groves to Solaro | 4,777.18 mi (7,688.14 km) |
| Webster Groves to Soliera | 4,885.37 mi (7,862.24 km) |
