| Boulder City to Spello | 6,070.05 mi (9,768.80 km) |
| Boulder City to Spilamberto | 5,935.27 mi (9,551.89 km) |
| Boulder City to Spilimbergo | 5,910.57 mi (9,512.14 km) |
| Boulder City to Spinea | 5,921.56 mi (9,529.83 km) |
| Boulder City to Spoleto | 6,082.78 mi (9,789.29 km) |
| Boulder City to Spoltore | 6,145.90 mi (9,890.87 km) |
| Boulder City to Spresiano | 5,909.09 mi (9,509.77 km) |
| Boulder City to Squinzano | 6,380.24 mi (10,268.00 km) |
| Boulder City to Statte | 6,346.16 mi (10,213.16 km) |
| Boulder City to Stezzano | 5,833.37 mi (9,387.89 km) |
| Boulder City to Strada | 5,994.57 mi (9,647.32 km) |
| Boulder City to Stradella | 5,850.90 mi (9,416.11 km) |
| Boulder City to Striano | 6,247.87 mi (10,054.97 km) |
| Boulder City to Subiaco | 6,140.02 mi (9,881.40 km) |
| Boulder City to Sulmona | 6,160.84 mi (9,914.91 km) |
