| Hackettstown to Idar-Oberstein | 3,837.26 mi (6,175.48 km) |
| Hackettstown to Idstein | 3,861.29 mi (6,214.15 km) |
| Hackettstown to Illertissen | 3,995.40 mi (6,429.97 km) |
| Hackettstown to Illingen | 3,836.32 mi (6,173.96 km) |
| Hackettstown to Ilmenau | 3,952.48 mi (6,360.90 km) |
| Hackettstown to Ilsede | 3,876.80 mi (6,239.11 km) |
| Hackettstown to Ilsenburg | 3,907.75 mi (6,288.92 km) |
| Hackettstown to Ilsfeld | 3,935.57 mi (6,333.68 km) |
| Hackettstown to Ilvesheim | 3,895.14 mi (6,268.63 km) |
| Hackettstown to Immenstadt im Allgau | 4,021.51 mi (6,471.99 km) |
| Hackettstown to Ingelheim | 3,859.70 mi (6,211.59 km) |
| Hackettstown to Ingolstadt | 4,032.63 mi (6,489.90 km) |
| Hackettstown to Iserlohn | 3,803.99 mi (6,121.93 km) |
| Hackettstown to Isernhagen-Sud | 3,859.47 mi (6,211.21 km) |
| Hackettstown to Ismaning | 4,059.94 mi (6,533.85 km) |
