| Castricum to Kenosha (Wisconsin) | 4,065.81 mi (6,543.29 km) |
| Castricum to Kent (Ohio) | 3,893.45 mi (6,265.89 km) |
| Castricum to Kent (Washington) | 4,856.78 mi (7,816.23 km) |
| Castricum to Kentwood (Michigan) | 3,968.42 mi (6,386.55 km) |
| Castricum to Kerman (California) | 5,433.14 mi (8,743.79 km) |
| Castricum to Kernersville (North Carolina) | 4,086.97 mi (6,577.34 km) |
| Castricum to Kerrville (Texas) | 5,128.41 mi (8,253.39 km) |
| Castricum to Kettering (Maryland) | 3,823.50 mi (6,153.34 km) |
| Castricum to Kettering (Ohio) | 4,068.70 mi (6,547.93 km) |
| Castricum to Kewanee (Illinois) | 4,206.02 mi (6,768.94 km) |
| Castricum to Key Biscayne (Florida) | 4,617.26 mi (7,430.76 km) |
| Castricum to Key Largo (Florida) | 4,656.97 mi (7,494.67 km) |
| Castricum to Key West (Florida) | 4,742.14 mi (7,631.73 km) |
| Castricum to Keystone (Florida) | 4,589.81 mi (7,386.58 km) |
| Castricum to Kihei (Hawaii) | 7,245.25 mi (11,660.11 km) |
