| Idar-Oberstein to Busto Garolfo | 296.84 mi (477.72 km) |
| Idar-Oberstein to Cabras | 678.22 mi (1,091.48 km) |
| Idar-Oberstein to Cadelbosco di Sopra | 374.73 mi (603.08 km) |
| Idar-Oberstein to Cadoneghe | 364.62 mi (586.80 km) |
| Idar-Oberstein to Cagli | 495.03 mi (796.67 km) |
| Idar-Oberstein to Cagliari | 729.69 mi (1,174.33 km) |
| Idar-Oberstein to Cairo Montenotte | 369.71 mi (594.99 km) |
| Idar-Oberstein to Caivano | 693.29 mi (1,115.73 km) |
| Idar-Oberstein to Calcinaia | 444.84 mi (715.89 km) |
| Idar-Oberstein to Calcinato | 327.43 mi (526.94 km) |
| Idar-Oberstein to Calderara di Reno | 400.96 mi (645.29 km) |
| Idar-Oberstein to Caldogno | 344.21 mi (553.95 km) |
| Idar-Oberstein to Calenzano | 442.92 mi (712.81 km) |
| Idar-Oberstein to Calolziocorte | 287.61 mi (462.86 km) |
| Idar-Oberstein to Caltagirone | 933.34 mi (1,502.06 km) |
