| Hackettstown to Jozefow | 4,293.10 mi (6,909.07 km) |
| Hackettstown to Kalisz | 4,191.06 mi (6,744.86 km) |
| Hackettstown to Kamien Pomorski | 3,997.11 mi (6,432.73 km) |
| Hackettstown to Kamienna Gora | 4,147.30 mi (6,674.44 km) |
| Hackettstown to Karczew | 4,295.52 mi (6,912.96 km) |
| Hackettstown to Kartuzy | 4,108.22 mi (6,611.54 km) |
| Hackettstown to Katowice | 4,278.51 mi (6,885.60 km) |
| Hackettstown to Kedzierzyn-Kozle | 4,244.64 mi (6,831.09 km) |
| Hackettstown to Kepno | 4,203.85 mi (6,765.45 km) |
| Hackettstown to Ketrzyn | 4,228.41 mi (6,804.97 km) |
| Hackettstown to Kety | 4,299.26 mi (6,919.00 km) |
| Hackettstown to Kielce | 4,317.01 mi (6,947.55 km) |
| Hackettstown to Kielczow | 4,178.56 mi (6,724.75 km) |
| Hackettstown to Klobuck | 4,252.22 mi (6,843.29 km) |
| Hackettstown to Klodzko | 4,182.74 mi (6,731.47 km) |
