| Idar-Oberstein to Civita Castellana | 567.42 mi (913.17 km) |
| Idar-Oberstein to Civitanova Marche | 537.57 mi (865.13 km) |
| Idar-Oberstein to Civitavecchia | 568.16 mi (914.36 km) |
| Idar-Oberstein to Civitella in Val di Chiana | 482.41 mi (776.36 km) |
| Idar-Oberstein to Clusone | 291.39 mi (468.95 km) |
| Idar-Oberstein to Coccaglio | 312.26 mi (502.54 km) |
| Idar-Oberstein to Codigoro | 405.16 mi (652.05 km) |
| Idar-Oberstein to Codogno | 333.70 mi (537.04 km) |
| Idar-Oberstein to Codroipo | 368.79 mi (593.50 km) |
| Idar-Oberstein to Cogoleto | 373.01 mi (600.31 km) |
| Idar-Oberstein to Colle di Val d'Elsa | 472.18 mi (759.90 km) |
| Idar-Oberstein to Colle Salvetti | 448.12 mi (721.17 km) |
| Idar-Oberstein to Collecchio | 368.80 mi (593.53 km) |
| Idar-Oberstein to Colleferro | 615.64 mi (990.77 km) |
| Idar-Oberstein to Collegno | 320.40 mi (515.63 km) |
