| Castricum to Karis | 889.27 mi (1,431.14 km) |
| Castricum to Karkkila | 920.91 mi (1,482.06 km) |
| Castricum to Kauhajoki | 936.99 mi (1,507.94 km) |
| Castricum to Kauhava | 987.79 mi (1,589.70 km) |
| Castricum to Kauniainen | 926.71 mi (1,491.40 km) |
| Castricum to Kemi | 1,141.46 mi (1,837.00 km) |
| Castricum to Kemijarvi | 1,246.18 mi (2,005.53 km) |
| Castricum to Kempele | 1,124.28 mi (1,809.36 km) |
| Castricum to Kerava | 943.54 mi (1,518.48 km) |
| Castricum to Keuruu | 995.65 mi (1,602.34 km) |
| Castricum to Kiiminki | 1,139.99 mi (1,834.64 km) |
| Castricum to Kirkkonummi | 913.90 mi (1,470.78 km) |
| Castricum to Kitee | 1,144.56 mi (1,841.99 km) |
| Castricum to Kiuruvesi | 1,098.77 mi (1,768.30 km) |
| Castricum to Kivisto | 933.40 mi (1,502.16 km) |
