| Harpenden to Kothen | 523.82 mi (843.01 km) |
| Harpenden to Kranenburg | 271.63 mi (437.15 km) |
| Harpenden to Krefeld | 298.87 mi (480.99 km) |
| Harpenden to Kressbronn am Bodensee | 531.12 mi (854.76 km) |
| Harpenden to Kreuzau | 304.72 mi (490.40 km) |
| Harpenden to Kreuztal | 363.24 mi (584.58 km) |
| Harpenden to Kriftel | 401.86 mi (646.73 km) |
| Harpenden to Kronach | 518.52 mi (834.47 km) |
| Harpenden to Kronberg | 400.84 mi (645.09 km) |
| Harpenden to Kronshagen | 466.19 mi (750.26 km) |
| Harpenden to Krumbach | 535.07 mi (861.11 km) |
| Harpenden to Kulmbach | 525.83 mi (846.24 km) |
| Harpenden to Kummersbruck | 560.68 mi (902.34 km) |
| Harpenden to Kunzell | 444.41 mi (715.21 km) |
| Harpenden to Kunzelsau | 473.61 mi (762.20 km) |
