| Idar-Oberstein to Robertsville (New Jersey) | 3,838.01 mi (6,176.68 km) |
| Idar-Oberstein to Robinson (Texas) | 5,175.12 mi (8,328.56 km) |
| Idar-Oberstein to Robstown (Texas) | 5,389.71 mi (8,673.90 km) |
| Idar-Oberstein to Rochester (Michigan) | 4,083.26 mi (6,571.36 km) |
| Idar-Oberstein to Rochester (Minnesota) | 4,366.38 mi (7,027.01 km) |
| Idar-Oberstein to Rochester (New Hampshire) | 3,577.91 mi (5,758.09 km) |
| Idar-Oberstein to Rochester (New York) | 3,848.41 mi (6,193.42 km) |
| Idar-Oberstein to Rochester Hills (Michigan) | 4,085.66 mi (6,575.23 km) |
| Idar-Oberstein to Rock Hill (South Carolina) | 4,360.54 mi (7,017.61 km) |
| Idar-Oberstein to Rock Island (Illinois) | 4,421.03 mi (7,114.97 km) |
| Idar-Oberstein to Rock Springs (Wyoming) | 5,052.17 mi (8,130.68 km) |
| Idar-Oberstein to Rockford (Illinois) | 4,326.95 mi (6,963.55 km) |
| Idar-Oberstein to Rockledge (Florida) | 4,669.94 mi (7,515.54 km) |
| Idar-Oberstein to Rocklin (California) | 5,566.46 mi (8,958.35 km) |
| Idar-Oberstein to Rockport (Texas) | 5,353.90 mi (8,616.28 km) |
