| Hackettstown to Kamen | 3,798.13 mi (6,112.50 km) |
| Hackettstown to Kamenz | 4,057.53 mi (6,529.96 km) |
| Hackettstown to Kamp-Lintfort | 3,756.00 mi (6,044.69 km) |
| Hackettstown to Kandel | 3,891.79 mi (6,263.23 km) |
| Hackettstown to Kappeln | 3,800.07 mi (6,115.63 km) |
| Hackettstown to Karben | 3,880.73 mi (6,245.44 km) |
| Hackettstown to Karlsdorf-Neuthard | 3,904.23 mi (6,283.25 km) |
| Hackettstown to Karlsfeld | 4,051.89 mi (6,520.88 km) |
| Hackettstown to Karlsruhe | 3,902.34 mi (6,280.20 km) |
| Hackettstown to Kassel | 3,877.88 mi (6,240.84 km) |
| Hackettstown to Kaufbeuren | 4,028.21 mi (6,482.77 km) |
| Hackettstown to Kaufering | 4,032.38 mi (6,489.49 km) |
| Hackettstown to Kaufungen | 3,883.62 mi (6,250.08 km) |
| Hackettstown to Kehl | 3,891.49 mi (6,262.75 km) |
| Hackettstown to Kelheim | 4,045.50 mi (6,510.61 km) |
