| Harpenden to Kocaali | 1,644.27 mi (2,646.19 km) |
| Harpenden to Kocaeli | 1,618.25 mi (2,604.32 km) |
| Harpenden to Konak | 1,613.01 mi (2,595.90 km) |
| Harpenden to Konakli | 1,888.57 mi (3,039.36 km) |
| Harpenden to Konya | 1,852.16 mi (2,980.76 km) |
| Harpenden to Koprukoy | 2,152.36 mi (3,463.89 km) |
| Harpenden to Korfez | 1,609.80 mi (2,590.73 km) |
| Harpenden to Korkut | 2,200.51 mi (3,541.38 km) |
| Harpenden to Kose | 2,048.46 mi (3,296.67 km) |
| Harpenden to Kovancilar | 2,120.27 mi (3,412.25 km) |
| Harpenden to Koyulhisar | 1,967.50 mi (3,166.38 km) |
| Harpenden to Kozan | 2,006.89 mi (3,229.77 km) |
| Harpenden to Kozlu | 1,665.88 mi (2,680.98 km) |
| Harpenden to Kozluk | 2,211.61 mi (3,559.24 km) |
| Harpenden to Kucuk Dalyan | 2,079.03 mi (3,345.88 km) |
