| Potomac to Senftenberg | 4,224.88 mi (6,799.29 km) |
| Potomac to Siegburg | 3,980.01 mi (6,405.20 km) |
| Potomac to Siegen | 4,010.11 mi (6,453.66 km) |
| Potomac to Sigmaringen | 4,141.26 mi (6,664.71 km) |
| Potomac to Simbach am Inn | 4,290.97 mi (6,905.64 km) |
| Potomac to Simmerath | 3,949.23 mi (6,355.67 km) |
| Potomac to Sindelfingen | 4,113.39 mi (6,619.86 km) |
| Potomac to Sinsheim | 4,092.41 mi (6,586.10 km) |
| Potomac to Sinzheim | 4,077.60 mi (6,562.27 km) |
| Potomac to Sinzig | 3,989.04 mi (6,419.74 km) |
| Potomac to Soest | 3,994.47 mi (6,428.48 km) |
| Potomac to Solingen | 3,965.10 mi (6,381.21 km) |
| Potomac to Soltau | 4,021.50 mi (6,471.99 km) |
| Potomac to Sommerda | 4,124.09 mi (6,637.07 km) |
| Potomac to Sondershausen | 4,108.19 mi (6,611.49 km) |
