| South Houston to Sestu | 5,633.90 mi (9,066.88 km) |
| South Houston to Settimo Torinese | 5,369.12 mi (8,640.77 km) |
| South Houston to Seveso | 5,408.74 mi (8,704.53 km) |
| South Houston to Sezze | 5,727.80 mi (9,218.01 km) |
| South Houston to Siano | 5,824.91 mi (9,374.29 km) |
| South Houston to Siena | 5,585.02 mi (8,988.23 km) |
| South Houston to Signa | 5,558.04 mi (8,944.80 km) |
| South Houston to Silea | 5,538.11 mi (8,912.72 km) |
| South Houston to Silvi Paese | 5,731.87 mi (9,224.56 km) |
| South Houston to Sinalunga | 5,605.84 mi (9,021.73 km) |
| South Houston to Siniscola | 5,614.78 mi (9,036.12 km) |
| South Houston to Sinnai | 5,638.84 mi (9,074.84 km) |
| South Houston to Siracusa | 5,999.38 mi (9,655.07 km) |
| South Houston to Solaro | 5,407.52 mi (8,702.56 km) |
| South Houston to Soliera | 5,515.60 mi (8,876.50 km) |
