| Potomac to Reichenbach/Vogtland | 4,187.01 mi (6,738.35 km) |
| Potomac to Reinbek | 4,022.36 mi (6,473.36 km) |
| Potomac to Reinfeld | 4,022.01 mi (6,472.80 km) |
| Potomac to Reinheim | 4,073.19 mi (6,555.17 km) |
| Potomac to Reiskirchen | 4,050.72 mi (6,519.00 km) |
| Potomac to Rellingen | 4,002.22 mi (6,440.96 km) |
| Potomac to Remagen | 3,987.26 mi (6,416.87 km) |
| Potomac to Remscheid | 3,969.28 mi (6,387.94 km) |
| Potomac to Rendsburg | 3,978.76 mi (6,403.19 km) |
| Potomac to Renningen | 4,109.01 mi (6,612.81 km) |
| Potomac to Reutlingen | 4,129.15 mi (6,645.22 km) |
| Potomac to Rhaude | 3,929.44 mi (6,323.83 km) |
| Potomac to Rheda-Wiedenbruck | 3,994.41 mi (6,428.38 km) |
| Potomac to Rhede | 3,931.91 mi (6,327.79 km) |
| Potomac to Rheinau | 4,070.82 mi (6,551.35 km) |
