| Idar-Oberstein to Kamenz | 316.96 mi (510.10 km) |
| Idar-Oberstein to Kamp-Lintfort | 128.22 mi (206.35 km) |
| Idar-Oberstein to Kandel | 58.94 mi (94.85 km) |
| Idar-Oberstein to Kappeln | 359.48 mi (578.52 km) |
| Idar-Oberstein to Karben | 73.99 mi (119.08 km) |
| Idar-Oberstein to Karlsdorf-Neuthard | 68.10 mi (109.60 km) |
| Idar-Oberstein to Karlsfeld | 214.82 mi (345.72 km) |
| Idar-Oberstein to Karlsruhe | 69.02 mi (111.08 km) |
| Idar-Oberstein to Kassel | 146.63 mi (235.97 km) |
| Idar-Oberstein to Kaufbeuren | 196.69 mi (316.54 km) |
| Idar-Oberstein to Kaufering | 197.33 mi (317.57 km) |
| Idar-Oberstein to Kaufungen | 148.41 mi (238.85 km) |
| Idar-Oberstein to Kehl | 82.30 mi (132.45 km) |
| Idar-Oberstein to Kelheim | 212.29 mi (341.65 km) |
| Idar-Oberstein to Kelkheim (Taunus) | 58.51 mi (94.17 km) |
