| Houston to Spello | 5,654.74 mi (9,100.42 km) |
| Houston to Spilamberto | 5,527.41 mi (8,895.51 km) |
| Houston to Spilimbergo | 5,544.08 mi (8,922.34 km) |
| Houston to Spinea | 5,538.78 mi (8,913.81 km) |
| Houston to Spoleto | 5,664.17 mi (9,115.61 km) |
| Houston to Spoltore | 5,737.12 mi (9,233.01 km) |
| Houston to Spresiano | 5,531.52 mi (8,902.13 km) |
| Houston to Squinzano | 5,983.04 mi (9,628.77 km) |
| Houston to Statte | 5,941.77 mi (9,562.35 km) |
| Houston to Stezzano | 5,430.20 mi (8,739.07 km) |
| Houston to Strada | 5,575.20 mi (8,972.41 km) |
| Houston to Stradella | 5,435.85 mi (8,748.15 km) |
| Houston to Striano | 5,819.71 mi (9,365.91 km) |
| Houston to Subiaco | 5,713.37 mi (9,194.78 km) |
| Houston to Sulmona | 5,744.02 mi (9,244.11 km) |
