| Hackettstown to Koscian | 4,126.93 mi (6,641.65 km) |
| Hackettstown to Koscielisko | 4,347.10 mi (6,995.98 km) |
| Hackettstown to Koscierzyna | 4,107.73 mi (6,610.76 km) |
| Hackettstown to Kostrzyn | 4,137.69 mi (6,658.97 km) |
| Hackettstown to Kostrzyn nad Odra | 4,036.64 mi (6,496.35 km) |
| Hackettstown to Koszalin | 4,040.78 mi (6,503.00 km) |
| Hackettstown to Kowary | 4,139.39 mi (6,661.70 km) |
| Hackettstown to Kozienice | 4,325.27 mi (6,960.84 km) |
| Hackettstown to Kozuchow | 4,098.70 mi (6,596.23 km) |
| Hackettstown to Kozy | 4,297.93 mi (6,916.85 km) |
| Hackettstown to Krakow | 4,320.66 mi (6,953.42 km) |
| Hackettstown to Krapkowice | 4,231.69 mi (6,810.25 km) |
| Hackettstown to Krasnik | 4,373.72 mi (7,038.82 km) |
| Hackettstown to Krasnystaw | 4,406.45 mi (7,091.49 km) |
| Hackettstown to Krosno | 4,402.79 mi (7,085.60 km) |
