| Port Huron to Solofra | 4,694.28 mi (7,554.72 km) |
| Port Huron to Somma Lombardo | 4,247.06 mi (6,834.99 km) |
| Port Huron to Somma Vesuviana | 4,675.67 mi (7,524.77 km) |
| Port Huron to Sommacampagna | 4,344.08 mi (6,991.12 km) |
| Port Huron to Sona | 4,342.10 mi (6,987.94 km) |
| Port Huron to Sondrio | 4,275.07 mi (6,880.05 km) |
| Port Huron to Sora | 4,606.24 mi (7,413.02 km) |
| Port Huron to Sorbolo | 4,349.90 mi (7,000.48 km) |
| Port Huron to Soresina | 4,308.86 mi (6,934.43 km) |
| Port Huron to Sorisole | 4,283.29 mi (6,893.29 km) |
| Port Huron to Sorrento | 4,683.55 mi (7,537.45 km) |
| Port Huron to Sorso | 4,433.96 mi (7,135.77 km) |
| Port Huron to Sortino | 4,861.57 mi (7,823.94 km) |
| Port Huron to Soverato Marina | 4,858.12 mi (7,818.38 km) |
| Port Huron to Sovicille | 4,444.20 mi (7,152.25 km) |
