| South Portland to Kanjiza | 4,173.27 mi (6,716.23 km) |
| South Portland to Kikinda | 4,198.21 mi (6,756.36 km) |
| South Portland to Kladovo | 4,332.88 mi (6,973.10 km) |
| South Portland to Knic | 4,283.91 mi (6,894.28 km) |
| South Portland to Knjazevac | 4,370.45 mi (7,033.56 km) |
| South Portland to Koceljeva | 4,225.07 mi (6,799.60 km) |
| South Portland to Kosjeric | 4,247.93 mi (6,836.39 km) |
| South Portland to Kovacica | 4,233.08 mi (6,812.49 km) |
| South Portland to Kovin | 4,261.16 mi (6,857.68 km) |
| South Portland to Kragujevac | 4,289.12 mi (6,902.67 km) |
| South Portland to Kraljevo | 4,290.35 mi (6,904.66 km) |
| South Portland to Krupanj | 4,211.14 mi (6,777.18 km) |
| South Portland to Krusevac | 4,322.06 mi (6,955.69 km) |
| South Portland to Kucevo | 4,299.94 mi (6,920.09 km) |
| South Portland to Kula | 4,170.42 mi (6,711.64 km) |
