| Castricum to Klaukkala | 932.25 mi (1,500.30 km) |
| Castricum to Kokkola | 1,022.10 mi (1,644.91 km) |
| Castricum to Kontiolahti | 1,155.61 mi (1,859.77 km) |
| Castricum to Korsholm | 955.32 mi (1,537.43 km) |
| Castricum to Kotka | 1,002.58 mi (1,613.50 km) |
| Castricum to Kouvola | 1,006.51 mi (1,619.82 km) |
| Castricum to Kuhmo | 1,190.89 mi (1,916.55 km) |
| Castricum to Kuopio | 1,099.12 mi (1,768.86 km) |
| Castricum to Kurikka | 950.47 mi (1,529.63 km) |
| Castricum to Kuusamo | 1,252.31 mi (2,015.39 km) |
| Castricum to Kuusankoski | 1,005.23 mi (1,617.76 km) |
| Castricum to Lahti | 978.18 mi (1,574.23 km) |
| Castricum to Laitila | 860.61 mi (1,385.02 km) |
| Castricum to Lapinlahti | 1,108.00 mi (1,783.15 km) |
| Castricum to Lappeenranta | 1,057.39 mi (1,701.71 km) |
