| Idar-Oberstein to Colchester | 317.72 mi (511.32 km) |
| Idar-Oberstein to Coleford | 456.79 mi (735.13 km) |
| Idar-Oberstein to Colne | 495.81 mi (797.93 km) |
| Idar-Oberstein to Colwyn Bay | 533.55 mi (858.66 km) |
| Idar-Oberstein to Congleton | 474.13 mi (763.04 km) |
| Idar-Oberstein to Conisbrough | 449.10 mi (722.76 km) |
| Idar-Oberstein to Connahs Quay | 507.21 mi (816.28 km) |
| Idar-Oberstein to Consett | 524.05 mi (843.37 km) |
| Idar-Oberstein to Conwy | 538.22 mi (866.18 km) |
| Idar-Oberstein to Cookstown | 684.56 mi (1,101.69 km) |
| Idar-Oberstein to Corby | 396.82 mi (638.61 km) |
| Idar-Oberstein to Corfe Mullen | 418.46 mi (673.44 km) |
| Idar-Oberstein to Corsham | 433.09 mi (696.99 km) |
| Idar-Oberstein to Coseley | 451.70 mi (726.94 km) |
| Idar-Oberstein to Cosham | 377.93 mi (608.22 km) |
