| Boulder City to Sesena | 5,611.60 mi (9,031.00 km) |
| Boulder City to Sestao | 5,496.09 mi (8,845.11 km) |
| Boulder City to Sevilla | 5,642.69 mi (9,081.03 km) |
| Boulder City to Sevilla La Nueva | 5,587.41 mi (8,992.07 km) |
| Boulder City to Silla | 5,776.92 mi (9,297.05 km) |
| Boulder City to Silleda | 5,316.07 mi (8,555.39 km) |
| Boulder City to Sitges | 5,775.10 mi (9,294.13 km) |
| Boulder City to Socuellamos | 5,684.48 mi (9,148.29 km) |
| Boulder City to Soller | 5,879.06 mi (9,461.44 km) |
| Boulder City to Solsona | 5,728.39 mi (9,218.96 km) |
| Boulder City to Son Servera | 5,911.28 mi (9,513.29 km) |
| Boulder City to Sonseca | 5,619.34 mi (9,043.45 km) |
| Boulder City to Sopelana | 5,493.97 mi (8,841.68 km) |
| Boulder City to Soria | 5,586.11 mi (8,989.98 km) |
| Boulder City to Suances | 5,450.37 mi (8,771.53 km) |
