| Harwich to Jozefow | 846.16 mi (1,361.77 km) |
| Harwich to Kalisz | 716.20 mi (1,152.62 km) |
| Harwich to Kamien Pomorski | 578.59 mi (931.15 km) |
| Harwich to Kamienna Gora | 640.94 mi (1,031.50 km) |
| Harwich to Karczew | 847.29 mi (1,363.59 km) |
| Harwich to Kartuzy | 719.36 mi (1,157.69 km) |
| Harwich to Katowice | 776.73 mi (1,250.02 km) |
| Harwich to Kedzierzyn-Kozle | 740.44 mi (1,191.63 km) |
| Harwich to Kepno | 717.14 mi (1,154.13 km) |
| Harwich to Ketrzyn | 846.41 mi (1,362.16 km) |
| Harwich to Kety | 792.33 mi (1,275.13 km) |
| Harwich to Kielce | 835.48 mi (1,344.58 km) |
| Harwich to Kielczow | 684.67 mi (1,101.87 km) |
| Harwich to Klobuck | 762.48 mi (1,227.10 km) |
| Harwich to Klodzko | 672.98 mi (1,083.06 km) |
