| Idar-Oberstein to Red Bank (New Jersey) | 3,828.37 mi (6,161.17 km) |
| Idar-Oberstein to Red Bank (Tennessee) | 4,525.76 mi (7,283.51 km) |
| Idar-Oberstein to Red Bluff (California) | 5,512.22 mi (8,871.05 km) |
| Idar-Oberstein to Red Hill (South Carolina) | 4,332.58 mi (6,972.62 km) |
| Idar-Oberstein to Red Oak (Texas) | 5,106.21 mi (8,217.65 km) |
| Idar-Oberstein to Red Wing (Minnesota) | 4,343.46 mi (6,990.12 km) |
| Idar-Oberstein to Redan (Georgia) | 4,546.85 mi (7,317.45 km) |
| Idar-Oberstein to Redding (California) | 5,491.90 mi (8,838.36 km) |
| Idar-Oberstein to Redland (Maryland) | 4,007.71 mi (6,449.79 km) |
| Idar-Oberstein to Redlands (California) | 5,727.14 mi (9,216.94 km) |
| Idar-Oberstein to Redmond (Oregon) | 5,242.08 mi (8,436.31 km) |
| Idar-Oberstein to Redmond (Washington) | 5,064.20 mi (8,150.04 km) |
| Idar-Oberstein to Redondo Beach (California) | 5,775.26 mi (9,294.38 km) |
| Idar-Oberstein to Redwood City (California) | 5,671.07 mi (9,126.70 km) |
| Idar-Oberstein to Reedley (California) | 5,645.96 mi (9,086.29 km) |
