| Idar-Oberstein to Catania | 927.91 mi (1,493.33 km) |
| Idar-Oberstein to Catanzaro | 875.34 mi (1,408.72 km) |
| Idar-Oberstein to Cattolica | 472.13 mi (759.81 km) |
| Idar-Oberstein to Cava de' Tirreni | 718.20 mi (1,155.83 km) |
| Idar-Oberstein to Cavallino | 837.35 mi (1,347.58 km) |
| Idar-Oberstein to Cavarzere | 386.59 mi (622.15 km) |
| Idar-Oberstein to Cave | 608.61 mi (979.47 km) |
| Idar-Oberstein to Cavriago | 377.72 mi (607.88 km) |
| Idar-Oberstein to Cavriglia | 471.37 mi (758.60 km) |
| Idar-Oberstein to Cazzago San Martino | 311.97 mi (502.07 km) |
| Idar-Oberstein to Ceccano | 632.95 mi (1,018.64 km) |
| Idar-Oberstein to Cecina | 467.24 mi (751.94 km) |
| Idar-Oberstein to Cefalu | 872.36 mi (1,403.93 km) |
| Idar-Oberstein to Ceglie Messapico | 797.32 mi (1,283.16 km) |
| Idar-Oberstein to Celano | 605.89 mi (975.09 km) |
