| Boppard to Koscielisko | 551.94 mi (888.27 km) |
| Boppard to Koscierzyna | 514.98 mi (828.78 km) |
| Boppard to Kostrzyn | 441.58 mi (710.65 km) |
| Boppard to Kostrzyn nad Odra | 345.49 mi (556.02 km) |
| Boppard to Koszalin | 455.00 mi (732.25 km) |
| Boppard to Kowary | 364.03 mi (585.85 km) |
| Boppard to Kozienice | 615.06 mi (989.84 km) |
| Boppard to Kozuchow | 363.57 mi (585.10 km) |
| Boppard to Kozy | 512.95 mi (825.51 km) |
| Boppard to Krakow | 546.16 mi (878.96 km) |
| Boppard to Krapkowice | 457.38 mi (736.08 km) |
| Boppard to Krasnik | 642.47 mi (1,033.95 km) |
| Boppard to Krasnystaw | 684.40 mi (1,101.43 km) |
| Boppard to Krosno | 629.59 mi (1,013.22 km) |
| Boppard to Krosno Odrzanskie | 348.37 mi (560.65 km) |
