| Idar-Oberstein to Cartagena | 932.56 mi (1,500.81 km) |
| Idar-Oberstein to Cartama | 1,078.07 mi (1,734.99 km) |
| Idar-Oberstein to Cartaya | 1,119.76 mi (1,802.09 km) |
| Idar-Oberstein to Caspe | 684.69 mi (1,101.90 km) |
| Idar-Oberstein to Cassa de la Selva | 580.95 mi (934.95 km) |
| Idar-Oberstein to Castalla | 862.78 mi (1,388.50 km) |
| Idar-Oberstein to Castellbisbal | 624.22 mi (1,004.58 km) |
| Idar-Oberstein to Castelldefels | 636.90 mi (1,025.00 km) |
| Idar-Oberstein to Castello de Ampurias | 553.48 mi (890.74 km) |
| Idar-Oberstein to Castellon de la Plana | 761.56 mi (1,225.62 km) |
| Idar-Oberstein to Castilleja de la Cuesta | 1,079.81 mi (1,737.79 km) |
| Idar-Oberstein to Catarroja | 806.25 mi (1,297.53 km) |
| Idar-Oberstein to Catral | 893.30 mi (1,437.63 km) |
| Idar-Oberstein to Caudete | 863.29 mi (1,389.32 km) |
| Idar-Oberstein to Cehegin | 920.53 mi (1,481.44 km) |
