| Idar-Oberstein to Bumbesti-Jiu | 811.47 mi (1,305.94 km) |
| Idar-Oberstein to Busteni | 897.41 mi (1,444.23 km) |
| Idar-Oberstein to Buzau | 961.33 mi (1,547.11 km) |
| Idar-Oberstein to Cajvana | 859.54 mi (1,383.30 km) |
| Idar-Oberstein to Calafat | 836.19 mi (1,345.71 km) |
| Idar-Oberstein to Calan | 777.71 mi (1,251.60 km) |
| Idar-Oberstein to Calarasi | 1,014.17 mi (1,632.15 km) |
| Idar-Oberstein to Campia Turzii | 792.77 mi (1,275.84 km) |
| Idar-Oberstein to Campina | 914.88 mi (1,472.36 km) |
| Idar-Oberstein to Campulung | 880.45 mi (1,416.94 km) |
| Idar-Oberstein to Campulung Moldovenesc | 844.32 mi (1,358.80 km) |
| Idar-Oberstein to Caracal | 889.51 mi (1,431.53 km) |
| Idar-Oberstein to Caransebes | 753.94 mi (1,213.35 km) |
| Idar-Oberstein to Carei | 703.84 mi (1,132.72 km) |
| Idar-Oberstein to Cernavoda | 1,039.99 mi (1,673.71 km) |
