| Idar-Oberstein to Racconigi | 342.09 mi (550.53 km) |
| Idar-Oberstein to Raffadali | 904.77 mi (1,456.09 km) |
| Idar-Oberstein to Ragusa | 957.76 mi (1,541.37 km) |
| Idar-Oberstein to Ramacca | 927.54 mi (1,492.74 km) |
| Idar-Oberstein to Randazzo | 900.50 mi (1,449.21 km) |
| Idar-Oberstein to Rapallo | 381.28 mi (613.61 km) |
| Idar-Oberstein to Ravanusa | 921.34 mi (1,482.75 km) |
| Idar-Oberstein to Ravenna | 431.99 mi (695.22 km) |
| Idar-Oberstein to Recanati | 526.82 mi (847.84 km) |
| Idar-Oberstein to Recco | 379.24 mi (610.34 km) |
| Idar-Oberstein to Reggello | 461.84 mi (743.26 km) |
| Idar-Oberstein to Reggio di Calabria | 901.03 mi (1,450.07 km) |
| Idar-Oberstein to Reggio Emilia | 379.62 mi (610.93 km) |
| Idar-Oberstein to Reggiolo | 369.61 mi (594.82 km) |
| Idar-Oberstein to Rende | 838.38 mi (1,349.24 km) |
