| Prospect Heights to Jozefow | 4,676.01 mi (7,525.31 km) |
| Prospect Heights to Kalisz | 4,589.50 mi (7,386.09 km) |
| Prospect Heights to Kamien Pomorski | 4,387.04 mi (7,060.27 km) |
| Prospect Heights to Kamienna Gora | 4,562.08 mi (7,341.95 km) |
| Prospect Heights to Karczew | 4,678.80 mi (7,529.81 km) |
| Prospect Heights to Kartuzy | 4,482.62 mi (7,214.07 km) |
| Prospect Heights to Katowice | 4,686.39 mi (7,542.01 km) |
| Prospect Heights to Kedzierzyn-Kozle | 4,654.98 mi (7,491.47 km) |
| Prospect Heights to Kepno | 4,606.87 mi (7,414.05 km) |
| Prospect Heights to Ketrzyn | 4,593.27 mi (7,392.16 km) |
| Prospect Heights to Kety | 4,709.48 mi (7,579.18 km) |
| Prospect Heights to Kielce | 4,713.26 mi (7,585.25 km) |
| Prospect Heights to Kielczow | 4,585.89 mi (7,380.28 km) |
| Prospect Heights to Klobuck | 4,654.80 mi (7,491.18 km) |
| Prospect Heights to Klodzko | 4,598.28 mi (7,400.22 km) |
