| Harpenden to Kelkheim (Taunus) | 399.83 mi (643.46 km) |
| Harpenden to Kelsterbach | 405.05 mi (651.86 km) |
| Harpenden to Kemberg | 554.12 mi (891.77 km) |
| Harpenden to Kempen | 292.24 mi (470.32 km) |
| Harpenden to Kempten | 552.61 mi (889.34 km) |
| Harpenden to Kenzingen | 438.70 mi (706.01 km) |
| Harpenden to Kerpen | 311.00 mi (500.51 km) |
| Harpenden to Ketsch | 424.63 mi (683.37 km) |
| Harpenden to Kevelaer | 283.09 mi (455.60 km) |
| Harpenden to Kiel | 468.14 mi (753.39 km) |
| Harpenden to Kierspe | 343.88 mi (553.43 km) |
| Harpenden to Kirchhain | 405.91 mi (653.26 km) |
| Harpenden to Kirchheim bei Munchen | 592.74 mi (953.93 km) |
| Harpenden to Kirchheim unter Teck | 484.93 mi (780.42 km) |
| Harpenden to Kirchhundem | 366.32 mi (589.53 km) |
