| Grefrath to Kalisz | 504.69 mi (812.23 km) |
| Grefrath to Kamien Pomorski | 397.16 mi (639.17 km) |
| Grefrath to Kamienna Gora | 422.32 mi (679.66 km) |
| Grefrath to Karczew | 639.26 mi (1,028.79 km) |
| Grefrath to Kartuzy | 535.73 mi (862.18 km) |
| Grefrath to Katowice | 557.72 mi (897.56 km) |
| Grefrath to Kedzierzyn-Kozle | 521.28 mi (838.92 km) |
| Grefrath to Kepno | 502.34 mi (808.43 km) |
| Grefrath to Ketrzyn | 656.21 mi (1,056.07 km) |
| Grefrath to Kety | 572.34 mi (921.09 km) |
| Grefrath to Kielce | 619.89 mi (997.62 km) |
| Grefrath to Kielczow | 468.58 mi (754.10 km) |
| Grefrath to Klobuck | 546.15 mi (878.94 km) |
| Grefrath to Klodzko | 453.30 mi (729.51 km) |
| Grefrath to Kluczbork | 514.62 mi (828.20 km) |
