| Boulder City to Solofra | 6,256.22 mi (10,068.41 km) |
| Boulder City to Somma Lombardo | 5,800.67 mi (9,335.27 km) |
| Boulder City to Somma Vesuviana | 6,240.61 mi (10,043.29 km) |
| Boulder City to Sommacampagna | 5,884.86 mi (9,470.77 km) |
| Boulder City to Sona | 5,882.60 mi (9,467.12 km) |
| Boulder City to Sondrio | 5,813.74 mi (9,356.31 km) |
| Boulder City to Sora | 6,168.49 mi (9,927.23 km) |
| Boulder City to Sorbolo | 5,900.60 mi (9,496.10 km) |
| Boulder City to Soresina | 5,858.69 mi (9,428.64 km) |
| Boulder City to Sorisole | 5,829.04 mi (9,380.93 km) |
| Boulder City to Sorrento | 6,251.70 mi (10,061.14 km) |
| Boulder City to Sorso | 6,044.74 mi (9,728.07 km) |
| Boulder City to Sortino | 6,460.58 mi (10,397.30 km) |
| Boulder City to Soverato Marina | 6,428.86 mi (10,346.25 km) |
| Boulder City to Sovicille | 6,007.48 mi (9,668.11 km) |
