| Hackettstown to Dixon (California) | 2,475.71 mi (3,984.26 km) |
| Hackettstown to Dixon (Illinois) | 762.20 mi (1,226.64 km) |
| Hackettstown to Dobbs Ferry (New York) | 51.09 mi (82.22 km) |
| Hackettstown to Doctor Phillips (Florida) | 936.45 mi (1,507.07 km) |
| Hackettstown to Dodge City (Kansas) | 1,358.84 mi (2,186.84 km) |
| Hackettstown to Dolton (Illinois) | 665.11 mi (1,070.39 km) |
| Hackettstown to Donna (Texas) | 1,671.39 mi (2,689.84 km) |
| Hackettstown to Dorado (Puerto Rico) | 1,627.81 mi (2,619.71 km) |
| Hackettstown to Doral (Florida) | 1,086.39 mi (1,748.38 km) |
| Hackettstown to Doraville (Georgia) | 705.81 mi (1,135.89 km) |
| Hackettstown to Dothan (Alabama) | 888.15 mi (1,429.34 km) |
| Hackettstown to Douglas (Arizona) | 2,030.31 mi (3,267.47 km) |
| Hackettstown to Douglas (Georgia) | 785.07 mi (1,263.45 km) |
| Hackettstown to Douglasville (Georgia) | 731.63 mi (1,177.45 km) |
| Hackettstown to Dover (Delaware) | 122.61 mi (197.33 km) |
