| Harpenden to Kingswood | 95.55 mi (153.77 km) |
| Harpenden to Kippax | 141.24 mi (227.31 km) |
| Harpenden to Kirk of Shotts | 310.41 mi (499.56 km) |
| Harpenden to Kirkby | 156.54 mi (251.92 km) |
| Harpenden to Kirkby in Ashfield | 96.19 mi (154.80 km) |
| Harpenden to Kirkcaldy | 317.87 mi (511.56 km) |
| Harpenden to Kirkintilloch | 323.99 mi (521.41 km) |
| Harpenden to Kirkstall | 147.61 mi (237.55 km) |
| Harpenden to Kirkwall | 505.31 mi (813.22 km) |
| Harpenden to Knaresborough | 158.33 mi (254.81 km) |
| Harpenden to Knottingley | 135.69 mi (218.37 km) |
| Harpenden to Knowle | 70.58 mi (113.58 km) |
| Harpenden to Knowsley | 153.90 mi (247.67 km) |
| Harpenden to Knutsford | 133.09 mi (214.18 km) |
| Harpenden to Laindon | 37.04 mi (59.61 km) |
