| Potomac to Redon | 3,672.18 mi (5,909.80 km) |
| Potomac to Reims | 3,892.51 mi (6,264.39 km) |
| Potomac to Rennes | 3,678.77 mi (5,920.41 km) |
| Potomac to Revel | 3,966.32 mi (6,383.17 km) |
| Potomac to Reze | 3,705.87 mi (5,964.03 km) |
| Potomac to Riedisheim | 4,074.46 mi (6,557.20 km) |
| Potomac to Rillieux-la-Pape | 4,025.86 mi (6,479.00 km) |
| Potomac to Riom | 3,945.71 mi (6,350.00 km) |
| Potomac to Riorges | 3,982.04 mi (6,408.47 km) |
| Potomac to Ris-Orangis | 3,840.66 mi (6,180.95 km) |
| Potomac to Rive-de-Gier | 4,022.16 mi (6,473.04 km) |
| Potomac to Rivesaltes | 4,026.41 mi (6,479.88 km) |
| Potomac to Rixheim | 4,076.02 mi (6,559.72 km) |
| Potomac to Roanne | 3,983.45 mi (6,410.74 km) |
| Potomac to Roche-la-Moliere | 4,012.11 mi (6,456.86 km) |
