| Harpenden to Kirchlengern | 382.82 mi (616.08 km) |
| Harpenden to Kirchlinteln | 414.88 mi (667.68 km) |
| Harpenden to Kirchseeon | 601.52 mi (968.06 km) |
| Harpenden to Kirchzarten | 454.92 mi (732.12 km) |
| Harpenden to Kirkel | 375.99 mi (605.10 km) |
| Harpenden to Kissing | 557.67 mi (897.49 km) |
| Harpenden to Kisslegg | 533.90 mi (859.22 km) |
| Harpenden to Kitzingen | 481.13 mi (774.30 km) |
| Harpenden to Kleinblittersdorf | 372.99 mi (600.26 km) |
| Harpenden to Kleve | 277.30 mi (446.27 km) |
| Harpenden to Klipphausen | 599.13 mi (964.20 km) |
| Harpenden to Klotze | 490.01 mi (788.60 km) |
| Harpenden to Koblenz | 359.22 mi (578.11 km) |
| Harpenden to Kolbermoor | 616.55 mi (992.24 km) |
| Harpenden to Kolkwitz | 622.95 mi (1,002.54 km) |
