| Boulder to Jicin | 5,228.38 mi (8,414.26 km) |
| Boulder to Jihlava | 5,288.21 mi (8,510.56 km) |
| Boulder to Jindrichuv Hradec | 5,283.25 mi (8,502.58 km) |
| Boulder to Jirkov | 5,167.59 mi (8,316.43 km) |
| Boulder to Kadan | 5,168.32 mi (8,317.60 km) |
| Boulder to Karlovy Vary | 5,163.21 mi (8,309.39 km) |
| Boulder to Karvina | 5,352.51 mi (8,614.04 km) |
| Boulder to Kladno | 5,204.95 mi (8,376.57 km) |
| Boulder to Klasterec nad Ohri | 5,164.82 mi (8,311.98 km) |
| Boulder to Klatovy | 5,217.70 mi (8,397.07 km) |
| Boulder to Kolin | 5,244.52 mi (8,440.24 km) |
| Boulder to Koprivnice | 5,354.22 mi (8,616.79 km) |
| Boulder to Kralupy nad Vltavou | 5,206.84 mi (8,379.61 km) |
| Boulder to Kraluv Dvur | 5,212.96 mi (8,389.44 km) |
| Boulder to Krnov | 5,315.58 mi (8,554.60 km) |
