| Hardenberg to Kalisz | 488.54 mi (786.23 km) |
| Hardenberg to Kamien Pomorski | 350.46 mi (564.01 km) |
| Hardenberg to Kamienna Gora | 421.50 mi (678.35 km) |
| Hardenberg to Karczew | 617.78 mi (994.22 km) |
| Hardenberg to Kartuzy | 491.37 mi (790.78 km) |
| Hardenberg to Katowice | 556.64 mi (895.83 km) |
| Hardenberg to Kedzierzyn-Kozle | 520.99 mi (838.46 km) |
| Hardenberg to Kepno | 491.83 mi (791.52 km) |
| Hardenberg to Ketrzyn | 617.14 mi (993.20 km) |
| Hardenberg to Kety | 574.51 mi (924.59 km) |
| Hardenberg to Kielce | 610.22 mi (982.05 km) |
| Hardenberg to Kielczow | 460.93 mi (741.79 km) |
| Hardenberg to Klobuck | 538.42 mi (866.50 km) |
| Hardenberg to Klodzko | 455.57 mi (733.17 km) |
| Hardenberg to Kluczbork | 507.24 mi (816.33 km) |
