| Harrow to Jozefow | 918.24 mi (1,477.77 km) |
| Harrow to Kalisz | 787.57 mi (1,267.47 km) |
| Harrow to Kamien Pomorski | 651.67 mi (1,048.76 km) |
| Harrow to Kamienna Gora | 710.05 mi (1,142.72 km) |
| Harrow to Karczew | 919.33 mi (1,479.51 km) |
| Harrow to Kartuzy | 792.42 mi (1,275.28 km) |
| Harrow to Katowice | 845.68 mi (1,360.99 km) |
| Harrow to Kedzierzyn-Kozle | 809.29 mi (1,302.43 km) |
| Harrow to Kepno | 787.74 mi (1,267.75 km) |
| Harrow to Ketrzyn | 919.49 mi (1,479.77 km) |
| Harrow to Kety | 860.59 mi (1,384.99 km) |
| Harrow to Kielce | 905.93 mi (1,457.95 km) |
| Harrow to Kielczow | 754.85 mi (1,214.81 km) |
| Harrow to Klobuck | 832.64 mi (1,340.00 km) |
| Harrow to Klodzko | 741.46 mi (1,193.27 km) |
