| Idar-Oberstein to River Ridge (Louisiana) | 4,981.11 mi (8,016.32 km) |
| Idar-Oberstein to Riverbank (California) | 5,622.09 mi (9,047.88 km) |
| Idar-Oberstein to Riverdale (Georgia) | 4,565.43 mi (7,347.35 km) |
| Idar-Oberstein to Riverdale (Illinois) | 4,302.97 mi (6,924.96 km) |
| Idar-Oberstein to Riverside (California) | 5,740.60 mi (9,238.61 km) |
| Idar-Oberstein to Riverside (Ohio) | 4,255.98 mi (6,849.34 km) |
| Idar-Oberstein to Riverton (Utah) | 5,196.91 mi (8,363.61 km) |
| Idar-Oberstein to Riverton (Wyoming) | 4,947.76 mi (7,962.65 km) |
| Idar-Oberstein to Riverview (Florida) | 4,761.09 mi (7,662.23 km) |
| Idar-Oberstein to Riverview (Michigan) | 4,109.54 mi (6,613.67 km) |
| Idar-Oberstein to Riviera Beach (Florida) | 4,717.90 mi (7,592.73 km) |
| Idar-Oberstein to Riviera Beach (Maryland) | 3,981.16 mi (6,407.05 km) |
| Idar-Oberstein to Roanoke (Virginia) | 4,206.97 mi (6,770.47 km) |
| Idar-Oberstein to Roanoke Rapids (North Carolina) | 4,150.98 mi (6,680.36 km) |
| Idar-Oberstein to Robbinsdale (Minnesota) | 4,347.55 mi (6,996.70 km) |
