| Harpenden to Kidricevo | 818.14 mi (1,316.68 km) |
| Harpenden to Kobarid | 737.37 mi (1,186.68 km) |
| Harpenden to Kobilje | 831.92 mi (1,338.85 km) |
| Harpenden to Kocevje | 811.63 mi (1,306.20 km) |
| Harpenden to Komen | 761.98 mi (1,226.29 km) |
| Harpenden to Komenda | 776.15 mi (1,249.09 km) |
| Harpenden to Koper | 772.79 mi (1,243.68 km) |
| Harpenden to Kostanjevica na Krki | 825.23 mi (1,328.08 km) |
| Harpenden to Kostel | 819.21 mi (1,318.39 km) |
| Harpenden to Kozje | 821.43 mi (1,321.96 km) |
| Harpenden to Kranj | 768.39 mi (1,236.61 km) |
| Harpenden to Kranjska Gora | 735.77 mi (1,184.11 km) |
| Harpenden to Krizevci | 825.99 mi (1,329.31 km) |
| Harpenden to Krsko | 823.36 mi (1,325.07 km) |
| Harpenden to Kuzma | 813.93 mi (1,309.90 km) |
