| Idar-Oberstein to Karis | 961.44 mi (1,547.29 km) |
| Idar-Oberstein to Karkkila | 996.70 mi (1,604.04 km) |
| Idar-Oberstein to Kauhajoki | 1,043.83 mi (1,679.88 km) |
| Idar-Oberstein to Kauhava | 1,097.26 mi (1,765.87 km) |
| Idar-Oberstein to Kauniainen | 996.17 mi (1,603.18 km) |
| Idar-Oberstein to Kemi | 1,267.38 mi (2,039.65 km) |
| Idar-Oberstein to Kemijarvi | 1,370.40 mi (2,205.45 km) |
| Idar-Oberstein to Kempele | 1,240.53 mi (1,996.44 km) |
| Idar-Oberstein to Kerava | 1,013.89 mi (1,631.69 km) |
| Idar-Oberstein to Keuruu | 1,089.72 mi (1,753.73 km) |
| Idar-Oberstein to Kiiminki | 1,257.15 mi (2,023.19 km) |
| Idar-Oberstein to Kirkkonummi | 983.37 mi (1,582.58 km) |
| Idar-Oberstein to Kitee | 1,218.13 mi (1,960.39 km) |
| Idar-Oberstein to Kiuruvesi | 1,199.86 mi (1,930.99 km) |
| Idar-Oberstein to Kivisto | 1,003.80 mi (1,615.46 km) |
