| Potomac to Jicin | 4,311.31 mi (6,938.39 km) |
| Potomac to Jihlava | 4,355.48 mi (7,009.47 km) |
| Potomac to Jindrichuv Hradec | 4,341.06 mi (6,986.26 km) |
| Potomac to Jirkov | 4,235.49 mi (6,816.37 km) |
| Potomac to Kadan | 4,232.58 mi (6,811.68 km) |
| Potomac to Karlovy Vary | 4,221.62 mi (6,794.03 km) |
| Potomac to Karvina | 4,453.82 mi (7,167.74 km) |
| Potomac to Kladno | 4,272.24 mi (6,875.50 km) |
| Potomac to Klasterec nad Ohri | 4,228.40 mi (6,804.96 km) |
| Potomac to Klatovy | 4,265.16 mi (6,864.12 km) |
| Potomac to Kolin | 4,319.11 mi (6,950.93 km) |
| Potomac to Koprivnice | 4,447.64 mi (7,157.78 km) |
| Potomac to Kralupy nad Vltavou | 4,277.50 mi (6,883.97 km) |
| Potomac to Kraluv Dvur | 4,276.22 mi (6,881.91 km) |
| Potomac to Krnov | 4,413.23 mi (7,102.41 km) |
