| Castricum to Karditsa | 1,225.05 mi (1,971.52 km) |
| Castricum to Kastoria | 1,140.86 mi (1,836.04 km) |
| Castricum to Katerini | 1,194.61 mi (1,922.53 km) |
| Castricum to Keratsini | 1,357.25 mi (2,184.28 km) |
| Castricum to Kerkyra | 1,149.24 mi (1,849.53 km) |
| Castricum to Kiato | 1,327.38 mi (2,136.21 km) |
| Castricum to Kifisia | 1,357.17 mi (2,184.16 km) |
| Castricum to Kilkis | 1,168.85 mi (1,881.08 km) |
| Castricum to Komotini | 1,252.37 mi (2,015.49 km) |
| Castricum to Korinthos | 1,336.99 mi (2,151.68 km) |
| Castricum to Koropi | 1,369.21 mi (2,203.53 km) |
| Castricum to Korydallos | 1,357.39 mi (2,184.50 km) |
| Castricum to Kos | 1,538.42 mi (2,475.84 km) |
| Castricum to Kozani | 1,169.35 mi (1,881.89 km) |
| Castricum to Lagos | 1,239.97 mi (1,995.53 km) |
