| Duffel to Kalisz | 585.20 mi (941.79 km) |
| Duffel to Kamien Pomorski | 473.88 mi (762.63 km) |
| Duffel to Kamienna Gora | 501.36 mi (806.86 km) |
| Duffel to Karczew | 719.87 mi (1,158.52 km) |
| Duffel to Kartuzy | 613.49 mi (987.31 km) |
| Duffel to Katowice | 636.34 mi (1,024.10 km) |
| Duffel to Kedzierzyn-Kozle | 599.86 mi (965.38 km) |
| Duffel to Kepno | 582.45 mi (937.36 km) |
| Duffel to Ketrzyn | 735.33 mi (1,183.39 km) |
| Duffel to Kety | 650.23 mi (1,046.45 km) |
| Duffel to Kielce | 699.75 mi (1,126.13 km) |
| Duffel to Kielczow | 548.45 mi (882.64 km) |
| Duffel to Klobuck | 625.87 mi (1,007.25 km) |
| Duffel to Klodzko | 531.61 mi (855.55 km) |
| Duffel to Kluczbork | 594.36 mi (956.53 km) |
