| Southborough to Koscian | 704.23 mi (1,133.35 km) |
| Southborough to Koscielisko | 874.21 mi (1,406.91 km) |
| Southborough to Koscierzyna | 768.18 mi (1,236.27 km) |
| Southborough to Kostrzyn | 728.20 mi (1,171.92 km) |
| Southborough to Kostrzyn nad Odra | 621.13 mi (999.61 km) |
| Southborough to Koszalin | 697.34 mi (1,122.26 km) |
| Southborough to Kowary | 676.49 mi (1,088.71 km) |
| Southborough to Kozienice | 916.00 mi (1,474.17 km) |
| Southborough to Kozuchow | 660.26 mi (1,062.59 km) |
| Southborough to Kozy | 832.20 mi (1,339.30 km) |
| Southborough to Krakow | 863.26 mi (1,389.29 km) |
| Southborough to Krapkowice | 772.40 mi (1,243.05 km) |
| Southborough to Krasnik | 950.31 mi (1,529.37 km) |
| Southborough to Krasnystaw | 991.02 mi (1,594.89 km) |
| Southborough to Krosno | 947.86 mi (1,525.43 km) |
