| Catonsville to Rheinbach | 3,944.86 mi (6,348.64 km) |
| Catonsville to Rheinberg | 3,906.08 mi (6,286.23 km) |
| Catonsville to Rheine | 3,919.03 mi (6,307.07 km) |
| Catonsville to Rheinfelden (Baden) | 4,068.15 mi (6,547.05 km) |
| Catonsville to Ribnitz-Damgarten | 4,054.05 mi (6,524.37 km) |
| Catonsville to Richterich | 3,904.41 mi (6,283.55 km) |
| Catonsville to Riedlingen | 4,120.05 mi (6,630.58 km) |
| Catonsville to Riegelsberg | 3,981.92 mi (6,408.29 km) |
| Catonsville to Rielasingen-Worblingen | 4,106.72 mi (6,609.13 km) |
| Catonsville to Riesa | 4,174.40 mi (6,718.05 km) |
| Catonsville to Rietberg | 3,971.28 mi (6,391.16 km) |
| Catonsville to Rinteln | 3,985.56 mi (6,414.14 km) |
| Catonsville to Ritterhude | 3,945.63 mi (6,349.87 km) |
| Catonsville to Rodenbach | 4,042.23 mi (6,505.35 km) |
| Catonsville to Rodental | 4,119.26 mi (6,629.31 km) |
