| Gaithersburg to Jicin | 4,306.25 mi (6,930.23 km) |
| Gaithersburg to Jihlava | 4,350.52 mi (7,001.49 km) |
| Gaithersburg to Jindrichuv Hradec | 4,336.16 mi (6,978.37 km) |
| Gaithersburg to Jirkov | 4,230.49 mi (6,808.32 km) |
| Gaithersburg to Kadan | 4,227.60 mi (6,803.67 km) |
| Gaithersburg to Karlovy Vary | 4,216.67 mi (6,786.08 km) |
| Gaithersburg to Karvina | 4,448.69 mi (7,159.47 km) |
| Gaithersburg to Kladno | 4,267.25 mi (6,867.48 km) |
| Gaithersburg to Klasterec nad Ohri | 4,223.43 mi (6,796.95 km) |
| Gaithersburg to Klatovy | 4,260.30 mi (6,856.30 km) |
| Gaithersburg to Kolin | 4,314.09 mi (6,942.86 km) |
| Gaithersburg to Koprivnice | 4,442.55 mi (7,149.59 km) |
| Gaithersburg to Kralupy nad Vltavou | 4,272.49 mi (6,875.92 km) |
| Gaithersburg to Kraluv Dvur | 4,271.26 mi (6,873.93 km) |
| Gaithersburg to Krnov | 4,408.10 mi (7,094.16 km) |
