| Boulder to Kanjiza | 5,597.88 mi (9,008.92 km) |
| Boulder to Kikinda | 5,622.51 mi (9,048.56 km) |
| Boulder to Kladovo | 5,754.20 mi (9,260.50 km) |
| Boulder to Knic | 5,733.89 mi (9,227.81 km) |
| Boulder to Knjazevac | 5,809.44 mi (9,349.39 km) |
| Boulder to Koceljeva | 5,675.79 mi (9,134.30 km) |
| Boulder to Kosjeric | 5,704.43 mi (9,180.40 km) |
| Boulder to Kovacica | 5,666.54 mi (9,119.41 km) |
| Boulder to Kovin | 5,696.60 mi (9,167.80 km) |
| Boulder to Kragujevac | 5,735.53 mi (9,230.45 km) |
| Boulder to Kraljevo | 5,743.40 mi (9,243.11 km) |
| Boulder to Krupanj | 5,667.56 mi (9,121.06 km) |
| Boulder to Krusevac | 5,770.86 mi (9,287.31 km) |
| Boulder to Kucevo | 5,732.41 mi (9,225.42 km) |
| Boulder to Kula | 5,607.02 mi (9,023.62 km) |
