| Harpenden to Kavak | 1,860.49 mi (2,994.17 km) |
| Harpenden to Kayapinar | 2,167.87 mi (3,488.85 km) |
| Harpenden to Kayseri | 1,936.88 mi (3,117.11 km) |
| Harpenden to Kemalpasa | 1,623.81 mi (2,613.28 km) |
| Harpenden to Kemer | 1,834.94 mi (2,953.05 km) |
| Harpenden to Keskin | 1,817.62 mi (2,925.18 km) |
| Harpenden to Kilimli | 1,667.30 mi (2,683.27 km) |
| Harpenden to Kilis | 2,094.80 mi (3,371.26 km) |
| Harpenden to Kinik | 1,590.75 mi (2,560.07 km) |
| Harpenden to Kirikkale | 1,806.21 mi (2,906.81 km) |
| Harpenden to Kirkagac | 1,601.87 mi (2,577.96 km) |
| Harpenden to Kirklareli | 1,466.74 mi (2,360.48 km) |
| Harpenden to Kirsehir | 1,863.28 mi (2,998.66 km) |
| Harpenden to Kizilpinar | 1,516.88 mi (2,441.18 km) |
| Harpenden to Kiziltepe | 2,217.58 mi (3,568.86 km) |
