| Mercer Island to Santa Ursula | 5,460.22 mi (8,787.38 km) |
| Mercer Island to Santander | 5,117.33 mi (8,235.55 km) |
| Mercer Island to Santany | 5,557.89 mi (8,944.56 km) |
| Mercer Island to Santiago de Compostela | 4,997.43 mi (8,042.59 km) |
| Mercer Island to Santiago del Teide | 5,453.94 mi (8,777.26 km) |
| Mercer Island to Santiponce | 5,371.96 mi (8,645.34 km) |
| Mercer Island to Santomera | 5,502.11 mi (8,854.79 km) |
| Mercer Island to Santona | 5,129.23 mi (8,254.70 km) |
| Mercer Island to Santurce-Antiguo | 5,148.41 mi (8,285.57 km) |
| Mercer Island to Sarria | 5,039.26 mi (8,109.90 km) |
| Mercer Island to Sauzal | 5,459.64 mi (8,786.44 km) |
| Mercer Island to Sedavi | 5,446.60 mi (8,765.45 km) |
| Mercer Island to Segorbe | 5,419.53 mi (8,721.89 km) |
| Mercer Island to Segovia | 5,244.43 mi (8,440.10 km) |
| Mercer Island to Senmanat | 5,399.82 mi (8,690.18 km) |
