| Harpenden to Kongen | 480.43 mi (773.18 km) |
| Harpenden to Konigs Wusterhausen | 593.82 mi (955.67 km) |
| Harpenden to Konigsbach-Stein | 440.75 mi (709.32 km) |
| Harpenden to Konigsbrunn | 555.08 mi (893.32 km) |
| Harpenden to Konigslutter am Elm | 475.22 mi (764.79 km) |
| Harpenden to Konigstein im Taunus | 399.46 mi (642.86 km) |
| Harpenden to Konigswinter | 335.68 mi (540.23 km) |
| Harpenden to Konstanz | 512.71 mi (825.13 km) |
| Harpenden to Konz | 336.42 mi (541.41 km) |
| Harpenden to Korb | 474.71 mi (763.97 km) |
| Harpenden to Korbach | 397.54 mi (639.77 km) |
| Harpenden to Korntal-Munchingen | 465.61 mi (749.33 km) |
| Harpenden to Kornwestheim | 467.13 mi (751.77 km) |
| Harpenden to Korschenbroich | 298.56 mi (480.49 km) |
| Harpenden to Kosching | 561.71 mi (903.98 km) |
