| Porsgrunn to Kikinda | 1,020.07 mi (1,641.65 km) |
| Porsgrunn to Kladovo | 1,139.25 mi (1,833.44 km) |
| Porsgrunn to Knic | 1,148.37 mi (1,848.13 km) |
| Porsgrunn to Knjazevac | 1,206.11 mi (1,941.04 km) |
| Porsgrunn to Koceljeva | 1,097.18 mi (1,765.73 km) |
| Porsgrunn to Kosjeric | 1,129.70 mi (1,818.07 km) |
| Porsgrunn to Kovacica | 1,069.47 mi (1,721.14 km) |
| Porsgrunn to Kovin | 1,098.90 mi (1,768.51 km) |
| Porsgrunn to Kragujevac | 1,145.89 mi (1,844.13 km) |
| Porsgrunn to Kraljevo | 1,160.43 mi (1,867.53 km) |
| Porsgrunn to Krupanj | 1,096.99 mi (1,765.44 km) |
| Porsgrunn to Krusevac | 1,180.55 mi (1,899.91 km) |
| Porsgrunn to Kucevo | 1,128.81 mi (1,816.64 km) |
| Porsgrunn to Kula | 1,019.21 mi (1,640.25 km) |
| Porsgrunn to Kursumlija | 1,208.20 mi (1,944.40 km) |
