| Hardenberg to Kamen | 80.75 mi (129.95 km) |
| Hardenberg to Kamenz | 331.15 mi (532.94 km) |
| Hardenberg to Kamp-Lintfort | 73.79 mi (118.75 km) |
| Hardenberg to Kandel | 250.39 mi (402.96 km) |
| Hardenberg to Kappeln | 198.46 mi (319.38 km) |
| Hardenberg to Karben | 186.04 mi (299.40 km) |
| Hardenberg to Karlsdorf-Neuthard | 251.45 mi (404.68 km) |
| Hardenberg to Karlsfeld | 368.57 mi (593.15 km) |
| Hardenberg to Karlsruhe | 257.88 mi (415.01 km) |
| Hardenberg to Kassel | 150.08 mi (241.54 km) |
| Hardenberg to Kaufbeuren | 368.94 mi (593.75 km) |
| Hardenberg to Kaufering | 362.32 mi (583.09 km) |
| Hardenberg to Kaufungen | 155.71 mi (250.59 km) |
| Hardenberg to Kehl | 281.34 mi (452.77 km) |
| Hardenberg to Kelheim | 340.84 mi (548.53 km) |
