| Mercer Island to Solofra | 5,787.15 mi (9,313.52 km) |
| Mercer Island to Somma Lombardo | 5,343.39 mi (8,599.36 km) |
| Mercer Island to Somma Vesuviana | 5,774.74 mi (9,293.54 km) |
| Mercer Island to Sommacampagna | 5,413.56 mi (8,712.28 km) |
| Mercer Island to Sona | 5,411.16 mi (8,708.42 km) |
| Mercer Island to Sondrio | 5,343.76 mi (8,599.95 km) |
| Mercer Island to Sora | 5,703.24 mi (9,178.48 km) |
| Mercer Island to Sorbolo | 5,436.71 mi (8,749.54 km) |
| Mercer Island to Soresina | 5,395.84 mi (8,683.77 km) |
| Mercer Island to Sorisole | 5,364.11 mi (8,632.70 km) |
| Mercer Island to Sorrento | 5,788.15 mi (9,315.13 km) |
| Mercer Island to Sorso | 5,628.65 mi (9,058.43 km) |
| Mercer Island to Sortino | 6,016.60 mi (9,682.78 km) |
| Mercer Island to Soverato Marina | 5,960.50 mi (9,592.49 km) |
| Mercer Island to Sovicille | 5,549.68 mi (8,931.35 km) |
