| Castricum to Kaneohe (Hawaii) | 7,218.87 mi (11,617.65 km) |
| Castricum to Kankakee (Illinois) | 4,137.98 mi (6,659.43 km) |
| Castricum to Kannapolis (North Carolina) | 4,139.86 mi (6,662.46 km) |
| Castricum to Kansas City (Kansas) | 4,485.90 mi (7,219.36 km) |
| Castricum to Kansas City (Missouri) | 4,479.13 mi (7,208.46 km) |
| Castricum to Kapaa (Hawaii) | 7,190.47 mi (11,571.95 km) |
| Castricum to Kapolei (Hawaii) | 7,226.72 mi (11,630.29 km) |
| Castricum to Katy (Texas) | 5,019.50 mi (8,078.10 km) |
| Castricum to Kaukauna (Wisconsin) | 3,997.80 mi (6,433.84 km) |
| Castricum to Kaysville (Utah) | 4,947.05 mi (7,961.50 km) |
| Castricum to Kearney (Missouri) | 4,460.28 mi (7,178.13 km) |
| Castricum to Kearney (Nebraska) | 4,554.11 mi (7,329.14 km) |
| Castricum to Kearns (Utah) | 4,970.33 mi (7,998.97 km) |
| Castricum to Kearny (New Jersey) | 3,632.10 mi (5,845.30 km) |
| Castricum to Keene (New Hampshire) | 3,462.40 mi (5,572.20 km) |
