| Idar-Oberstein to Ratzeburg | 312.33 mi (502.64 km) |
| Idar-Oberstein to Raubling | 255.48 mi (411.16 km) |
| Idar-Oberstein to Rauenberg | 69.53 mi (111.89 km) |
| Idar-Oberstein to Raunheim | 54.85 mi (88.28 km) |
| Idar-Oberstein to Ravensburg | 169.44 mi (272.68 km) |
| Idar-Oberstein to Recke | 184.53 mi (296.98 km) |
| Idar-Oberstein to Recklinghausen | 129.62 mi (208.61 km) |
| Idar-Oberstein to Regen | 266.96 mi (429.62 km) |
| Idar-Oberstein to Regensburg | 219.90 mi (353.90 km) |
| Idar-Oberstein to Regenstauf | 220.17 mi (354.33 km) |
| Idar-Oberstein to Rehau | 212.23 mi (341.55 km) |
| Idar-Oberstein to Rehburg-Loccum | 206.35 mi (332.09 km) |
| Idar-Oberstein to Rehlingen-Siersburg | 37.02 mi (59.57 km) |
| Idar-Oberstein to Reichelsheim | 68.20 mi (109.75 km) |
| Idar-Oberstein to Reichenbach/Vogtland | 229.36 mi (369.13 km) |
