| North Potomac to Solofra | 4,628.32 mi (7,448.57 km) |
| North Potomac to Somma Lombardo | 4,192.92 mi (6,747.86 km) |
| North Potomac to Somma Vesuviana | 4,608.66 mi (7,416.92 km) |
| North Potomac to Sommacampagna | 4,293.95 mi (6,910.45 km) |
| North Potomac to Sona | 4,292.14 mi (6,907.53 km) |
| North Potomac to Sondrio | 4,227.19 mi (6,803.01 km) |
| North Potomac to Sora | 4,541.63 mi (7,309.05 km) |
| North Potomac to Sorbolo | 4,295.16 mi (6,912.39 km) |
| North Potomac to Soresina | 4,255.29 mi (6,848.22 km) |
| North Potomac to Sorisole | 4,232.06 mi (6,810.85 km) |
| North Potomac to Sorrento | 4,614.92 mi (7,426.99 km) |
| North Potomac to Sorso | 4,348.73 mi (6,998.61 km) |
| North Potomac to Sortino | 4,775.46 mi (7,685.37 km) |
| North Potomac to Soverato Marina | 4,785.41 mi (7,701.37 km) |
| North Potomac to Sovicille | 4,381.96 mi (7,052.08 km) |
