| Potomac to Rheinbach | 3,974.47 mi (6,396.29 km) |
| Potomac to Rheinberg | 3,935.63 mi (6,333.79 km) |
| Potomac to Rheine | 3,948.52 mi (6,354.52 km) |
| Potomac to Rheinfelden (Baden) | 4,097.88 mi (6,594.90 km) |
| Potomac to Ribnitz-Damgarten | 4,083.23 mi (6,571.32 km) |
| Potomac to Richterich | 3,934.03 mi (6,331.20 km) |
| Potomac to Riedlingen | 4,149.74 mi (6,678.36 km) |
| Potomac to Riegelsberg | 4,011.60 mi (6,456.05 km) |
| Potomac to Rielasingen-Worblingen | 4,136.44 mi (6,656.95 km) |
| Potomac to Riesa | 4,203.83 mi (6,765.41 km) |
| Potomac to Rietberg | 4,000.78 mi (6,438.64 km) |
| Potomac to Rinteln | 4,015.02 mi (6,461.55 km) |
| Potomac to Ritterhude | 3,975.01 mi (6,397.16 km) |
| Potomac to Rodenbach | 4,071.84 mi (6,552.99 km) |
| Potomac to Rodental | 4,148.82 mi (6,676.88 km) |
