| Hackettstown to Duluth (Minnesota) | 952.51 mi (1,532.92 km) |
| Hackettstown to Dumas (Texas) | 1,503.75 mi (2,420.05 km) |
| Hackettstown to Dumont (New Jersey) | 43.98 mi (70.78 km) |
| Hackettstown to Duncan (Oklahoma) | 1,331.13 mi (2,142.25 km) |
| Hackettstown to Duncanville (Texas) | 1,342.85 mi (2,161.11 km) |
| Hackettstown to Dundalk (Maryland) | 140.55 mi (226.20 km) |
| Hackettstown to Dunedin (Florida) | 994.13 mi (1,599.90 km) |
| Hackettstown to Dunkirk (New York) | 258.27 mi (415.65 km) |
| Hackettstown to Dunmore (Pennsylvania) | 56.19 mi (90.43 km) |
| Hackettstown to Dunwoody (Georgia) | 705.76 mi (1,135.81 km) |
| Hackettstown to Durango (Colorado) | 1,779.80 mi (2,864.31 km) |
| Hackettstown to Durant (Oklahoma) | 1,270.52 mi (2,044.70 km) |
| Hackettstown to Durham (North Carolina) | 402.56 mi (647.86 km) |
| Hackettstown to Dyer (Indiana) | 660.51 mi (1,062.99 km) |
| Hackettstown to Dyersburg (Tennessee) | 853.23 mi (1,373.15 km) |
