| Harpenden to Juprelle | 265.48 mi (427.25 km) |
| Harpenden to Jurbise | 205.72 mi (331.07 km) |
| Harpenden to Kalmthout | 208.94 mi (336.26 km) |
| Harpenden to Kampenhout | 219.85 mi (353.81 km) |
| Harpenden to Kapelle-op-den-Bos | 210.70 mi (339.08 km) |
| Harpenden to Kapellen | 208.39 mi (335.37 km) |
| Harpenden to Kasterlee | 231.19 mi (372.06 km) |
| Harpenden to Keerbergen | 221.97 mi (357.22 km) |
| Harpenden to Kinrooi | 266.17 mi (428.36 km) |
| Harpenden to Knokke-Heist | 159.67 mi (256.96 km) |
| Harpenden to Koekelare | 152.01 mi (244.63 km) |
| Harpenden to Koekelberg | 212.59 mi (342.14 km) |
| Harpenden to Koksijde | 138.42 mi (222.77 km) |
| Harpenden to Kontich | 211.97 mi (341.12 km) |
| Harpenden to Kortemark | 156.15 mi (251.30 km) |
