| Rockford to Idar-Oberstein | 4,326.95 mi (6,963.55 km) |
| Rockford to Idstein | 4,342.46 mi (6,988.51 km) |
| Rockford to Illertissen | 4,489.14 mi (7,224.57 km) |
| Rockford to Illingen | 4,330.24 mi (6,968.84 km) |
| Rockford to Ilmenau | 4,419.26 mi (7,112.12 km) |
| Rockford to Ilsede | 4,330.29 mi (6,968.93 km) |
| Rockford to Ilsenburg | 4,363.53 mi (7,022.42 km) |
| Rockford to Ilsfeld | 4,424.57 mi (7,120.66 km) |
| Rockford to Ilvesheim | 4,382.60 mi (7,053.11 km) |
| Rockford to Immenstadt im Allgau | 4,520.77 mi (7,275.47 km) |
| Rockford to Ingelheim | 4,344.09 mi (6,991.14 km) |
| Rockford to Ingolstadt | 4,516.03 mi (7,267.85 km) |
| Rockford to Iserlohn | 4,275.55 mi (6,880.84 km) |
| Rockford to Isernhagen-Sud | 4,312.39 mi (6,940.13 km) |
| Rockford to Ismaning | 4,547.39 mi (7,318.32 km) |
