| Idar-Oberstein to Rhosllanerchrugog | 501.29 mi (806.75 km) |
| Idar-Oberstein to Rhyl | 526.08 mi (846.64 km) |
| Idar-Oberstein to Rhymney | 483.97 mi (778.88 km) |
| Idar-Oberstein to Richmond | 354.92 mi (571.18 km) |
| Idar-Oberstein to Rickmansworth | 365.48 mi (588.18 km) |
| Idar-Oberstein to Ripley | 440.71 mi (709.26 km) |
| Idar-Oberstein to Ripon | 484.50 mi (779.73 km) |
| Idar-Oberstein to Risca | 473.70 mi (762.34 km) |
| Idar-Oberstein to Rochdale | 486.79 mi (783.41 km) |
| Idar-Oberstein to Rochester | 320.32 mi (515.51 km) |
| Idar-Oberstein to Rock Ferry | 509.90 mi (820.61 km) |
| Idar-Oberstein to Rogerstone | 471.88 mi (759.42 km) |
| Idar-Oberstein to Romford | 337.88 mi (543.77 km) |
| Idar-Oberstein to Romsey | 398.04 mi (640.59 km) |
| Idar-Oberstein to Ross on Wye | 457.78 mi (736.72 km) |
