| Rockville to Jicin | 4,306.48 mi (6,930.61 km) |
| Rockville to Jihlava | 4,350.68 mi (7,001.74 km) |
| Rockville to Jindrichuv Hradec | 4,336.28 mi (6,978.56 km) |
| Rockville to Jirkov | 4,230.68 mi (6,808.62 km) |
| Rockville to Kadan | 4,227.77 mi (6,803.95 km) |
| Rockville to Karlovy Vary | 4,216.82 mi (6,786.31 km) |
| Rockville to Karvina | 4,448.97 mi (7,159.92 km) |
| Rockville to Kladno | 4,267.43 mi (6,867.76 km) |
| Rockville to Klasterec nad Ohri | 4,223.60 mi (6,797.22 km) |
| Rockville to Klatovy | 4,260.39 mi (6,856.44 km) |
| Rockville to Kolin | 4,314.29 mi (6,943.18 km) |
| Rockville to Koprivnice | 4,442.80 mi (7,149.99 km) |
| Rockville to Kralupy nad Vltavou | 4,272.68 mi (6,876.22 km) |
| Rockville to Kraluv Dvur | 4,271.42 mi (6,874.18 km) |
| Rockville to Krnov | 4,408.38 mi (7,094.60 km) |
