| Idar-Oberstein to Romeoville (Illinois) | 4,320.93 mi (6,953.87 km) |
| Idar-Oberstein to Romulus (Michigan) | 4,113.78 mi (6,620.49 km) |
| Idar-Oberstein to Ronkonkoma (New York) | 3,770.09 mi (6,067.37 km) |
| Idar-Oberstein to Roosevelt (New York) | 3,794.22 mi (6,106.20 km) |
| Idar-Oberstein to Rosamond (California) | 5,711.31 mi (9,191.46 km) |
| Idar-Oberstein to Rosaryville (Maryland) | 4,011.19 mi (6,455.39 km) |
| Idar-Oberstein to Roscoe (Illinois) | 4,316.98 mi (6,947.51 km) |
| Idar-Oberstein to Rose Hill (Virginia) | 4,021.79 mi (6,472.45 km) |
| Idar-Oberstein to Roseburg (Oregon) | 5,359.18 mi (8,624.76 km) |
| Idar-Oberstein to Rosedale (California) | 5,710.13 mi (9,189.56 km) |
| Idar-Oberstein to Rosedale (Maryland) | 3,973.10 mi (6,394.08 km) |
| Idar-Oberstein to Roselle (Illinois) | 4,303.84 mi (6,926.37 km) |
| Idar-Oberstein to Roselle (New Jersey) | 3,822.99 mi (6,152.51 km) |
| Idar-Oberstein to Roselle Park (New Jersey) | 3,822.72 mi (6,152.07 km) |
| Idar-Oberstein to Rosemead (California) | 5,753.95 mi (9,260.09 km) |
