| Idar-Oberstein to Roding | 236.32 mi (380.31 km) |
| Idar-Oberstein to Rodinghausen | 182.94 mi (294.42 km) |
| Idar-Oberstein to Roetgen | 81.43 mi (131.05 km) |
| Idar-Oberstein to Rommerskirchen | 95.45 mi (153.61 km) |
| Idar-Oberstein to Ronnenberg | 206.95 mi (333.05 km) |
| Idar-Oberstein to Rosbach vor der Hohe | 73.77 mi (118.72 km) |
| Idar-Oberstein to Rosdorf | 167.73 mi (269.93 km) |
| Idar-Oberstein to Rosenheim | 254.29 mi (409.25 km) |
| Idar-Oberstein to Rosrath | 82.32 mi (132.49 km) |
| Idar-Oberstein to Rossdorf | 65.15 mi (104.84 km) |
| Idar-Oberstein to Rosstal | 161.45 mi (259.82 km) |
| Idar-Oberstein to Rostock | 365.16 mi (587.68 km) |
| Idar-Oberstein to Rotenburg an der Fulda | 138.59 mi (223.04 km) |
| Idar-Oberstein to Roth | 172.60 mi (277.78 km) |
| Idar-Oberstein to Rothenbach an der Pegnitz | 176.87 mi (284.64 km) |
