| Hackettstown to Kidricevo | 4,290.06 mi (6,904.18 km) |
| Hackettstown to Kobarid | 4,204.47 mi (6,766.44 km) |
| Hackettstown to Kobilje | 4,304.36 mi (6,927.20 km) |
| Hackettstown to Kocevje | 4,278.68 mi (6,885.87 km) |
| Hackettstown to Komen | 4,226.59 mi (6,802.04 km) |
| Hackettstown to Komenda | 4,245.50 mi (6,832.46 km) |
| Hackettstown to Koper | 4,235.16 mi (6,815.83 km) |
| Hackettstown to Kostanjevica na Krki | 4,294.77 mi (6,911.77 km) |
| Hackettstown to Kostel | 4,285.55 mi (6,896.93 km) |
| Hackettstown to Kozje | 4,292.14 mi (6,907.53 km) |
| Hackettstown to Kranj | 4,237.49 mi (6,819.58 km) |
| Hackettstown to Kranjska Gora | 4,204.84 mi (6,767.03 km) |
| Hackettstown to Krizevci | 4,298.33 mi (6,917.50 km) |
| Hackettstown to Krsko | 4,293.46 mi (6,909.66 km) |
| Hackettstown to Kuzma | 4,286.37 mi (6,898.25 km) |
