| Idar-Oberstein to Rivarolo Canavese | 303.23 mi (488.00 km) |
| Idar-Oberstein to Rivoli | 320.85 mi (516.36 km) |
| Idar-Oberstein to Rocca di Papa | 607.24 mi (977.26 km) |
| Idar-Oberstein to Rocca Priora | 607.22 mi (977.22 km) |
| Idar-Oberstein to Roccapiemonte | 714.25 mi (1,149.48 km) |
| Idar-Oberstein to Roccastrada | 498.02 mi (801.49 km) |
| Idar-Oberstein to Romano di Lombardia | 311.21 mi (500.85 km) |
| Idar-Oberstein to Rome | 594.47 mi (956.70 km) |
| Idar-Oberstein to Roncade | 367.58 mi (591.56 km) |
| Idar-Oberstein to Ronchi dei Legionari | 392.61 mi (631.85 km) |
| Idar-Oberstein to Ronciglione | 563.89 mi (907.50 km) |
| Idar-Oberstein to Rosa | 344.90 mi (555.06 km) |
| Idar-Oberstein to Rosarno | 885.52 mi (1,425.11 km) |
| Idar-Oberstein to Rosignano Marittimo | 460.99 mi (741.89 km) |
| Idar-Oberstein to Rosolini | 969.03 mi (1,559.51 km) |
