| Castricum to Knurow | 624.43 mi (1,004.92 km) |
| Castricum to Kobylka | 694.97 mi (1,118.45 km) |
| Castricum to Kokoszki | 581.30 mi (935.51 km) |
| Castricum to Kolbuszowa | 752.13 mi (1,210.44 km) |
| Castricum to Kolno | 719.00 mi (1,157.13 km) |
| Castricum to Kolo | 588.70 mi (947.42 km) |
| Castricum to Kolobrzeg | 463.10 mi (745.30 km) |
| Castricum to Koluszki | 642.77 mi (1,034.43 km) |
| Castricum to Komorniki | 506.98 mi (815.91 km) |
| Castricum to Konin | 573.16 mi (922.42 km) |
| Castricum to Konskie | 676.90 mi (1,089.36 km) |
| Castricum to Konstancin-Jeziorna | 694.03 mi (1,116.93 km) |
| Castricum to Konstantynow Lodzki | 623.16 mi (1,002.88 km) |
| Castricum to Koronowo | 554.22 mi (891.93 km) |
| Castricum to Koscian | 506.57 mi (815.25 km) |
