| Potomac to Santa Venerina | 4,761.17 mi (7,662.37 km) |
| Potomac to Santeramo in Colle | 4,714.98 mi (7,588.03 km) |
| Potomac to Santo Stefano di Magra | 4,296.26 mi (6,914.16 km) |
| Potomac to Santo Stino di Livenza | 4,361.93 mi (7,019.86 km) |
| Potomac to Sarezzo | 4,259.65 mi (6,855.24 km) |
| Potomac to Sarno | 4,619.96 mi (7,435.10 km) |
| Potomac to Saronno | 4,210.75 mi (6,776.54 km) |
| Potomac to Sarzana | 4,299.84 mi (6,919.92 km) |
| Potomac to Sassari | 4,351.38 mi (7,002.87 km) |
| Potomac to Sasso Marconi | 4,346.09 mi (6,994.36 km) |
| Potomac to Sassuolo | 4,320.99 mi (6,953.96 km) |
| Potomac to Sava | 4,765.22 mi (7,668.89 km) |
| Potomac to Saviano | 4,611.85 mi (7,422.05 km) |
| Potomac to Savigliano | 4,180.99 mi (6,728.65 km) |
| Potomac to Savignano sul Panaro | 4,333.95 mi (6,974.82 km) |
