| Hackettstown to Isny im Allgau | 4,010.19 mi (6,453.78 km) |
| Hackettstown to Isselburg | 3,744.40 mi (6,026.03 km) |
| Hackettstown to Issum | 3,750.60 mi (6,036.01 km) |
| Hackettstown to Itzehoe | 3,804.79 mi (6,123.22 km) |
| Hackettstown to Jena | 3,971.12 mi (6,390.90 km) |
| Hackettstown to Jever | 3,753.45 mi (6,040.59 km) |
| Hackettstown to Jork | 3,821.76 mi (6,150.53 km) |
| Hackettstown to Juchen | 3,765.59 mi (6,060.13 km) |
| Hackettstown to Julich | 3,764.76 mi (6,058.79 km) |
| Hackettstown to Juterbog | 3,995.37 mi (6,429.93 km) |
| Hackettstown to Kaarst | 3,767.01 mi (6,062.41 km) |
| Hackettstown to Kaiserslautern | 3,863.54 mi (6,217.77 km) |
| Hackettstown to Kalkar | 3,740.06 mi (6,019.04 km) |
| Hackettstown to Kall | 3,782.70 mi (6,087.66 km) |
| Hackettstown to Kaltenkirchen | 3,823.72 mi (6,153.68 km) |
