| Idstein to Klaukkala | 950.20 mi (1,529.20 km) |
| Idstein to Kokkola | 1,088.14 mi (1,751.20 km) |
| Idstein to Kontiolahti | 1,184.01 mi (1,905.49 km) |
| Idstein to Korsholm | 1,021.22 mi (1,643.50 km) |
| Idstein to Kotka | 1,012.66 mi (1,629.72 km) |
| Idstein to Kouvola | 1,022.84 mi (1,646.10 km) |
| Idstein to Kuhmo | 1,235.08 mi (1,987.66 km) |
| Idstein to Kuopio | 1,136.38 mi (1,828.82 km) |
| Idstein to Kurikka | 1,007.52 mi (1,621.44 km) |
| Idstein to Kuusamo | 1,315.26 mi (2,116.71 km) |
| Idstein to Kuusankoski | 1,022.40 mi (1,645.40 km) |
| Idstein to Lahti | 1,000.29 mi (1,609.82 km) |
| Idstein to Laitila | 900.76 mi (1,449.63 km) |
| Idstein to Lapinlahti | 1,151.57 mi (1,853.27 km) |
| Idstein to Lappeenranta | 1,070.87 mi (1,723.39 km) |
