| Gaithersburg to Rheinbach | 3,969.70 mi (6,388.62 km) |
| Gaithersburg to Rheinberg | 3,930.76 mi (6,325.94 km) |
| Gaithersburg to Rheine | 3,943.52 mi (6,346.48 km) |
| Gaithersburg to Rheinfelden (Baden) | 4,093.48 mi (6,587.82 km) |
| Gaithersburg to Ribnitz-Damgarten | 4,077.82 mi (6,562.62 km) |
| Gaithersburg to Richterich | 3,929.27 mi (6,323.54 km) |
| Gaithersburg to Riedlingen | 4,145.19 mi (6,671.04 km) |
| Gaithersburg to Riegelsberg | 4,007.01 mi (6,448.66 km) |
| Gaithersburg to Rielasingen-Worblingen | 4,131.97 mi (6,649.76 km) |
| Gaithersburg to Riesa | 4,198.74 mi (6,757.22 km) |
| Gaithersburg to Rietberg | 3,995.81 mi (6,430.64 km) |
| Gaithersburg to Rinteln | 4,009.98 mi (6,453.43 km) |
| Gaithersburg to Ritterhude | 3,969.85 mi (6,388.86 km) |
| Gaithersburg to Rodenbach | 4,067.05 mi (6,545.29 km) |
| Gaithersburg to Rodental | 4,143.94 mi (6,669.02 km) |
