| Portalegre to Kikinda | 1,478.87 mi (2,380.02 km) |
| Portalegre to Kladovo | 1,575.63 mi (2,535.73 km) |
| Portalegre to Knic | 1,479.91 mi (2,381.68 km) |
| Portalegre to Knjazevac | 1,564.87 mi (2,518.42 km) |
| Portalegre to Koceljeva | 1,437.42 mi (2,313.31 km) |
| Portalegre to Kosjeric | 1,440.48 mi (2,318.23 km) |
| Portalegre to Kovacica | 1,481.27 mi (2,383.87 km) |
| Portalegre to Kovin | 1,495.85 mi (2,407.33 km) |
| Portalegre to Kragujevac | 1,491.29 mi (2,399.99 km) |
| Portalegre to Kraljevo | 1,477.87 mi (2,378.40 km) |
| Portalegre to Krupanj | 1,415.16 mi (2,277.48 km) |
| Portalegre to Krusevac | 1,509.54 mi (2,429.37 km) |
| Portalegre to Kucevo | 1,528.93 mi (2,460.58 km) |
| Portalegre to Kula | 1,432.86 mi (2,305.96 km) |
| Portalegre to Kursumlija | 1,506.15 mi (2,423.91 km) |
