| South Portland to Koscian | 3,826.53 mi (6,158.21 km) |
| South Portland to Koscielisko | 4,046.29 mi (6,511.87 km) |
| South Portland to Koscierzyna | 3,808.50 mi (6,129.19 km) |
| South Portland to Kostrzyn | 3,837.48 mi (6,175.83 km) |
| South Portland to Kostrzyn nad Odra | 3,736.20 mi (6,012.83 km) |
| South Portland to Koszalin | 3,741.28 mi (6,021.00 km) |
| South Portland to Kowary | 3,838.57 mi (6,177.58 km) |
| South Portland to Kozienice | 4,025.38 mi (6,478.22 km) |
| South Portland to Kozuchow | 3,798.10 mi (6,112.45 km) |
| South Portland to Kozy | 3,997.18 mi (6,432.84 km) |
| South Portland to Krakow | 4,020.02 mi (6,469.60 km) |
| South Portland to Krapkowice | 3,930.97 mi (6,326.29 km) |
| South Portland to Krasnik | 4,073.66 mi (6,555.92 km) |
| South Portland to Krasnystaw | 4,106.58 mi (6,608.90 km) |
| South Portland to Krosno | 4,102.25 mi (6,601.93 km) |
