| South Portland to Karditsa | 4,519.40 mi (7,273.27 km) |
| South Portland to Kastoria | 4,444.12 mi (7,152.12 km) |
| South Portland to Katerini | 4,506.38 mi (7,252.32 km) |
| South Portland to Keratsini | 4,651.19 mi (7,485.36 km) |
| South Portland to Kerkyra | 4,423.61 mi (7,119.11 km) |
| South Portland to Kiato | 4,612.26 mi (7,422.72 km) |
| South Portland to Kifisia | 4,654.69 mi (7,490.99 km) |
| South Portland to Kilkis | 4,491.79 mi (7,228.83 km) |
| South Portland to Komotini | 4,592.04 mi (7,390.18 km) |
| South Portland to Korinthos | 4,622.94 mi (7,439.90 km) |
| South Portland to Koropi | 4,664.99 mi (7,507.58 km) |
| South Portland to Korydallos | 4,651.89 mi (7,486.50 km) |
| South Portland to Kos | 4,853.51 mi (7,810.97 km) |
| South Portland to Kozani | 4,474.85 mi (7,201.58 km) |
| South Portland to Lagos | 4,577.42 mi (7,366.64 km) |
