| Idar-Oberstein to Ciampino | 602.75 mi (970.03 km) |
| Idar-Oberstein to Cicciano | 697.83 mi (1,123.05 km) |
| Idar-Oberstein to Cingoli | 520.11 mi (837.03 km) |
| Idar-Oberstein to Cinisello Balsamo | 300.85 mi (484.17 km) |
| Idar-Oberstein to Cinisi | 847.38 mi (1,363.73 km) |
| Idar-Oberstein to Cirie | 309.56 mi (498.19 km) |
| Idar-Oberstein to Ciro Marina | 861.08 mi (1,385.77 km) |
| Idar-Oberstein to Cislago | 290.95 mi (468.23 km) |
| Idar-Oberstein to Cisterna di Latina | 620.68 mi (998.89 km) |
| Idar-Oberstein to Cisternino | 790.60 mi (1,272.34 km) |
| Idar-Oberstein to Citta di Castello | 491.00 mi (790.19 km) |
| Idar-Oberstein to Citta Sant'Angelo | 592.11 mi (952.91 km) |
| Idar-Oberstein to Cittadella | 349.13 mi (561.87 km) |
| Idar-Oberstein to Cittanova | 896.37 mi (1,442.56 km) |
| Idar-Oberstein to Cividale del Friuli | 377.43 mi (607.41 km) |
