| Harpenden to Kanjiza | 1,003.22 mi (1,614.52 km) |
| Harpenden to Kikinda | 1,027.99 mi (1,654.40 km) |
| Harpenden to Kladovo | 1,162.15 mi (1,870.30 km) |
| Harpenden to Knic | 1,112.98 mi (1,791.18 km) |
| Harpenden to Knjazevac | 1,198.94 mi (1,929.50 km) |
| Harpenden to Koceljeva | 1,054.00 mi (1,696.24 km) |
| Harpenden to Kosjeric | 1,077.74 mi (1,734.46 km) |
| Harpenden to Kovacica | 1,061.67 mi (1,708.59 km) |
| Harpenden to Kovin | 1,089.60 mi (1,753.55 km) |
| Harpenden to Kragujevac | 1,117.87 mi (1,799.04 km) |
| Harpenden to Kraljevo | 1,119.85 mi (1,802.23 km) |
| Harpenden to Krupanj | 1,040.73 mi (1,674.90 km) |
| Harpenden to Krusevac | 1,151.16 mi (1,852.62 km) |
| Harpenden to Kucevo | 1,128.43 mi (1,816.03 km) |
| Harpenden to Kula | 998.99 mi (1,607.71 km) |
