| Idar-Oberstein to Capoterra | 732.57 mi (1,178.95 km) |
| Idar-Oberstein to Capriolo | 306.71 mi (493.60 km) |
| Idar-Oberstein to Capua | 681.67 mi (1,097.04 km) |
| Idar-Oberstein to Capurso | 757.24 mi (1,218.66 km) |
| Idar-Oberstein to Carate Brianza | 286.05 mi (460.35 km) |
| Idar-Oberstein to Caravaggio | 310.67 mi (499.97 km) |
| Idar-Oberstein to Carbonera | 361.61 mi (581.95 km) |
| Idar-Oberstein to Carbonia | 730.94 mi (1,176.34 km) |
| Idar-Oberstein to Cardito | 693.29 mi (1,115.73 km) |
| Idar-Oberstein to Carignano | 332.39 mi (534.92 km) |
| Idar-Oberstein to Carini | 850.98 mi (1,369.51 km) |
| Idar-Oberstein to Carlentini | 940.30 mi (1,513.27 km) |
| Idar-Oberstein to Carmagnola | 336.42 mi (541.42 km) |
| Idar-Oberstein to Carmiano | 831.00 mi (1,337.37 km) |
| Idar-Oberstein to Carmignano | 443.26 mi (713.36 km) |
