| Hackettstown to Kinston (North Carolina) | 413.80 mi (665.94 km) |
| Hackettstown to Kirkland (Washington) | 2,352.90 mi (3,786.63 km) |
| Hackettstown to Kirksville (Missouri) | 931.68 mi (1,499.39 km) |
| Hackettstown to Kirkwood (Missouri) | 842.40 mi (1,355.71 km) |
| Hackettstown to Kiryas Joel (New York) | 48.06 mi (77.35 km) |
| Hackettstown to Kissimmee (Florida) | 943.96 mi (1,519.16 km) |
| Hackettstown to Klamath Falls (Oregon) | 2,398.92 mi (3,860.69 km) |
| Hackettstown to Knightdale (North Carolina) | 402.35 mi (647.52 km) |
| Hackettstown to Knik-Fairview (Alaska) | 3,314.43 mi (5,334.07 km) |
| Hackettstown to Knoxville (Tennessee) | 597.73 mi (961.96 km) |
| Hackettstown to Kokomo (Indiana) | 592.59 mi (953.68 km) |
| Hackettstown to Kuna (Idaho) | 2,114.20 mi (3,402.47 km) |
| Hackettstown to Kyle (Texas) | 1,492.75 mi (2,402.35 km) |
| Hackettstown to La Cañada Flintridge (California) | 2,395.46 mi (3,855.11 km) |
| Hackettstown to La Crescenta-Montrose (California) | 2,396.65 mi (3,857.04 km) |
