| Boulder City to Santa Ursula | 5,525.41 mi (8,892.30 km) |
| Boulder City to Santander | 5,458.55 mi (8,784.69 km) |
| Boulder City to Santany | 5,915.27 mi (9,519.71 km) |
| Boulder City to Santiago de Compostela | 5,296.08 mi (8,523.21 km) |
| Boulder City to Santiago del Teide | 5,514.61 mi (8,874.91 km) |
| Boulder City to Santiponce | 5,631.90 mi (9,063.66 km) |
| Boulder City to Santomera | 5,811.35 mi (9,352.47 km) |
| Boulder City to Santona | 5,472.90 mi (8,807.79 km) |
| Boulder City to Santurce-Antiguo | 5,494.23 mi (8,842.12 km) |
| Boulder City to Sarria | 5,345.51 mi (8,602.76 km) |
| Boulder City to Sauzal | 5,525.99 mi (8,893.23 km) |
| Boulder City to Sedavi | 5,774.90 mi (9,293.80 km) |
| Boulder City to Segorbe | 5,751.11 mi (9,255.51 km) |
| Boulder City to Segovia | 5,557.21 mi (8,943.47 km) |
| Boulder City to Senmanat | 5,769.84 mi (9,285.67 km) |
