| South Portland to Rheinbach | 3,495.50 mi (5,625.46 km) |
| South Portland to Rheinberg | 3,456.39 mi (5,562.53 km) |
| South Portland to Rheine | 3,469.12 mi (5,583.01 km) |
| South Portland to Rheinfelden (Baden) | 3,620.72 mi (5,826.99 km) |
| South Portland to Ribnitz-Damgarten | 3,604.62 mi (5,801.07 km) |
| South Portland to Richterich | 3,455.08 mi (5,560.42 km) |
| South Portland to Riedlingen | 3,671.69 mi (5,909.02 km) |
| South Portland to Riegelsberg | 3,533.33 mi (5,686.35 km) |
| South Portland to Rielasingen-Worblingen | 3,658.85 mi (5,888.35 km) |
| South Portland to Riesa | 3,724.44 mi (5,993.90 km) |
| South Portland to Rietberg | 3,521.41 mi (5,667.16 km) |
| South Portland to Rinteln | 3,535.62 mi (5,690.02 km) |
| South Portland to Ritterhude | 3,495.68 mi (5,625.75 km) |
| South Portland to Rodenbach | 3,592.82 mi (5,782.08 km) |
| South Portland to Rodental | 3,669.57 mi (5,905.60 km) |
