| Hackettstown to Kenosha (Wisconsin) | 682.93 mi (1,099.07 km) |
| Hackettstown to Kent (Ohio) | 341.31 mi (549.28 km) |
| Hackettstown to Kent (Washington) | 2,355.65 mi (3,791.06 km) |
| Hackettstown to Kentwood (Michigan) | 571.02 mi (918.97 km) |
| Hackettstown to Kerman (California) | 2,425.78 mi (3,903.91 km) |
| Hackettstown to Kernersville (North Carolina) | 433.98 mi (698.42 km) |
| Hackettstown to Kerrville (Texas) | 1,551.28 mi (2,496.55 km) |
| Hackettstown to Kettering (Maryland) | 171.09 mi (275.34 km) |
| Hackettstown to Kettering (Ohio) | 497.72 mi (801.01 km) |
| Hackettstown to Kewanee (Illinois) | 786.33 mi (1,265.48 km) |
| Hackettstown to Key Biscayne (Florida) | 1,091.54 mi (1,756.67 km) |
| Hackettstown to Key Largo (Florida) | 1,133.47 mi (1,824.14 km) |
| Hackettstown to Key West (Florida) | 1,194.82 mi (1,922.88 km) |
| Hackettstown to Keystone (Florida) | 983.21 mi (1,582.32 km) |
| Hackettstown to Kihei (Hawaii) | 4,866.10 mi (7,831.22 km) |
