| Castricum to Juprelle | 132.01 mi (212.44 km) |
| Castricum to Jurbise | 142.86 mi (229.91 km) |
| Castricum to Kalmthout | 81.06 mi (130.45 km) |
| Castricum to Kampenhout | 111.26 mi (179.06 km) |
| Castricum to Kapelle-op-den-Bos | 106.71 mi (171.74 km) |
| Castricum to Kapellen | 85.79 mi (138.07 km) |
| Castricum to Kasterlee | 90.63 mi (145.85 km) |
| Castricum to Keerbergen | 106.89 mi (172.02 km) |
| Castricum to Kinrooi | 107.35 mi (172.76 km) |
| Castricum to Knokke-Heist | 102.11 mi (164.32 km) |
| Castricum to Koekelare | 123.91 mi (199.41 km) |
| Castricum to Koekelberg | 117.18 mi (188.58 km) |
| Castricum to Koksijde | 132.10 mi (212.60 km) |
| Castricum to Kontich | 98.32 mi (158.23 km) |
| Castricum to Kortemark | 125.92 mi (202.64 km) |
