| South Houston to Solofra | 5,830.37 mi (9,383.08 km) |
| South Houston to Somma Lombardo | 5,389.15 mi (8,673.01 km) |
| South Houston to Somma Vesuviana | 5,811.10 mi (9,352.06 km) |
| South Houston to Sommacampagna | 5,488.32 mi (8,832.60 km) |
| South Houston to Sona | 5,486.42 mi (8,829.54 km) |
| South Houston to Sondrio | 5,420.29 mi (8,723.11 km) |
| South Houston to Sora | 5,743.03 mi (9,242.51 km) |
| South Houston to Sorbolo | 5,491.83 mi (8,838.25 km) |
| South Houston to Soresina | 5,451.33 mi (8,773.07 km) |
| South Houston to Sorisole | 5,426.90 mi (8,733.76 km) |
| South Houston to Sorrento | 5,817.98 mi (9,363.14 km) |
| South Houston to Sorso | 5,556.70 mi (8,942.65 km) |
| South Houston to Sortino | 5,984.06 mi (9,630.41 km) |
| South Houston to Soverato Marina | 5,990.14 mi (9,640.19 km) |
| South Houston to Sovicille | 5,582.16 mi (8,983.62 km) |
