| Idar-Oberstein to Coudekerque-Branche | 235.06 mi (378.30 km) |
| Idar-Oberstein to Coueron | 448.10 mi (721.14 km) |
| Idar-Oberstein to Coulommiers | 200.46 mi (322.61 km) |
| Idar-Oberstein to Courbevoic | 234.74 mi (377.77 km) |
| Idar-Oberstein to Courcouronnes | 233.02 mi (375.01 km) |
| Idar-Oberstein to Cournon-d'Auvergne | 334.26 mi (537.93 km) |
| Idar-Oberstein to Courrieres | 200.28 mi (322.32 km) |
| Idar-Oberstein to Coutras | 474.33 mi (763.36 km) |
| Idar-Oberstein to Couzeix | 386.71 mi (622.35 km) |
| Idar-Oberstein to Cran-Gevrier | 269.00 mi (432.91 km) |
| Idar-Oberstein to Craponne | 299.25 mi (481.60 km) |
| Idar-Oberstein to Creil | 219.00 mi (352.45 km) |
| Idar-Oberstein to Crepy-en-Valois | 201.38 mi (324.09 km) |
| Idar-Oberstein to Crest | 360.65 mi (580.40 km) |
| Idar-Oberstein to Creteil | 227.76 mi (366.54 km) |
