| Rockford to Indianapolis (Indiana) | 229.24 mi (368.92 km) |
| Rockford to Indianola (Iowa) | 239.91 mi (386.09 km) |
| Rockford to Indio (California) | 1,583.79 mi (2,548.86 km) |
| Rockford to Inglewood (California) | 1,682.02 mi (2,706.95 km) |
| Rockford to Inkster (Michigan) | 293.87 mi (472.93 km) |
| Rockford to Inver Grove Heights (Minnesota) | 267.25 mi (430.10 km) |
| Rockford to Inwood (New York) | 800.07 mi (1,287.59 km) |
| Rockford to Iona (Florida) | 1,159.64 mi (1,866.26 km) |
| Rockford to Ionia (Michigan) | 208.88 mi (336.16 km) |
| Rockford to Iowa City (Iowa) | 133.40 mi (214.69 km) |
| Rockford to Irmo (South Carolina) | 706.64 mi (1,137.22 km) |
| Rockford to Irondale (Alabama) | 616.21 mi (991.70 km) |
| Rockford to Ironton (Ohio) | 423.17 mi (681.02 km) |
| Rockford to Irvine (California) | 1,662.70 mi (2,675.86 km) |
| Rockford to Irving (Texas) | 779.86 mi (1,255.06 km) |
