| Prospect Heights to Koscian | 4,527.77 mi (7,286.74 km) |
| Prospect Heights to Koscielisko | 4,759.86 mi (7,660.25 km) |
| Prospect Heights to Koscierzyna | 4,484.95 mi (7,217.82 km) |
| Prospect Heights to Kostrzyn | 4,533.60 mi (7,296.13 km) |
| Prospect Heights to Kostrzyn nad Odra | 4,439.99 mi (7,145.47 km) |
| Prospect Heights to Koszalin | 4,423.62 mi (7,119.12 km) |
| Prospect Heights to Kowary | 4,554.83 mi (7,330.29 km) |
| Prospect Heights to Kozienice | 4,711.66 mi (7,582.68 km) |
| Prospect Heights to Kozuchow | 4,506.41 mi (7,252.37 km) |
| Prospect Heights to Kozy | 4,708.70 mi (7,577.92 km) |
| Prospect Heights to Krakow | 4,726.64 mi (7,606.79 km) |
| Prospect Heights to Krapkowice | 4,641.93 mi (7,470.46 km) |
| Prospect Heights to Krasnik | 4,763.21 mi (7,665.64 km) |
| Prospect Heights to Krasnystaw | 4,791.39 mi (7,711.00 km) |
| Prospect Heights to Krosno | 4,804.59 mi (7,732.24 km) |
