| Mercer Island to Sinop | 6,093.92 mi (9,807.22 km) |
| Mercer Island to Siran | 6,266.39 mi (10,084.78 km) |
| Mercer Island to Sirnak | 6,482.52 mi (10,432.61 km) |
| Mercer Island to Sirvan | 6,441.34 mi (10,366.33 km) |
| Mercer Island to Sivas | 6,270.54 mi (10,091.46 km) |
| Mercer Island to Sivasli | 6,244.94 mi (10,050.26 km) |
| Mercer Island to Siverek | 6,433.20 mi (10,353.23 km) |
| Mercer Island to Sivrice | 6,386.11 mi (10,277.46 km) |
| Mercer Island to Sivrihisar | 6,212.08 mi (9,997.37 km) |
| Mercer Island to Sogut | 6,152.66 mi (9,901.75 km) |
| Mercer Island to Sogutlu | 6,099.72 mi (9,816.55 km) |
| Mercer Island to Soke | 6,252.02 mi (10,061.66 km) |
| Mercer Island to Solhan | 6,370.01 mi (10,251.54 km) |
| Mercer Island to Soma | 6,162.27 mi (9,917.22 km) |
| Mercer Island to Sorgun | 6,242.08 mi (10,045.65 km) |
