| Potomac to Roermond | 3,920.36 mi (6,309.21 km) |
| Potomac to Roosendaal | 3,850.41 mi (6,196.64 km) |
| Potomac to Rosmalen | 3,882.24 mi (6,247.86 km) |
| Potomac to Rotterdam | 3,842.73 mi (6,184.28 km) |
| Potomac to Rozenburg | 3,833.02 mi (6,168.65 km) |
| Potomac to Rucphen | 3,855.74 mi (6,205.22 km) |
| Potomac to s-Gravendeel | 3,850.73 mi (6,197.15 km) |
| Potomac to s-Gravenzande | 3,827.42 mi (6,159.64 km) |
| Potomac to s-Heerenberg | 3,912.84 mi (6,297.11 km) |
| Potomac to s-Hertogenbosch | 3,880.45 mi (6,244.99 km) |
| Potomac to Sassenheim | 3,835.89 mi (6,173.27 km) |
| Potomac to Schaesberg | 3,929.73 mi (6,324.28 km) |
| Potomac to Schagen | 3,832.96 mi (6,168.55 km) |
| Potomac to Scherpenzeel | 3,876.74 mi (6,239.02 km) |
| Potomac to Scheveningen | 3,828.96 mi (6,162.11 km) |
