| Grefrath to Jicin | 397.39 mi (639.54 km) |
| Grefrath to Jihlava | 428.69 mi (689.90 km) |
| Grefrath to Jindrichuv Hradec | 411.35 mi (662.00 km) |
| Grefrath to Jirkov | 314.79 mi (506.60 km) |
| Grefrath to Kadan | 309.36 mi (497.86 km) |
| Grefrath to Karlovy Vary | 295.27 mi (475.19 km) |
| Grefrath to Karvina | 544.22 mi (875.83 km) |
| Grefrath to Kladno | 348.83 mi (561.38 km) |
| Grefrath to Klasterec nad Ohri | 304.95 mi (490.77 km) |
| Grefrath to Klatovy | 334.37 mi (538.12 km) |
| Grefrath to Kolin | 398.00 mi (640.51 km) |
| Grefrath to Koprivnice | 532.18 mi (856.45 km) |
| Grefrath to Kralupy nad Vltavou | 356.10 mi (573.08 km) |
| Grefrath to Kraluv Dvur | 350.26 mi (563.69 km) |
| Grefrath to Krnov | 503.77 mi (810.73 km) |
