| Boppard to Kalisz | 467.72 mi (752.73 km) |
| Boppard to Kamien Pomorski | 399.20 mi (642.45 km) |
| Boppard to Kamienna Gora | 372.73 mi (599.85 km) |
| Boppard to Karczew | 604.61 mi (973.02 km) |
| Boppard to Kartuzy | 529.67 mi (852.42 km) |
| Boppard to Katowice | 504.33 mi (811.64 km) |
| Boppard to Kedzierzyn-Kozle | 468.00 mi (753.17 km) |
| Boppard to Kepno | 459.62 mi (739.68 km) |
| Boppard to Ketrzyn | 640.97 mi (1,031.54 km) |
| Boppard to Kety | 515.61 mi (829.80 km) |
| Boppard to Kielce | 573.53 mi (923.00 km) |
| Boppard to Kielczow | 424.06 mi (682.46 km) |
| Boppard to Klobuck | 499.45 mi (803.79 km) |
| Boppard to Klodzko | 399.55 mi (643.01 km) |
| Boppard to Kluczbork | 468.41 mi (753.83 km) |
