| Rockford to Isny im Allgau | 4,508.99 mi (7,256.51 km) |
| Rockford to Isselburg | 4,215.45 mi (6,784.11 km) |
| Rockford to Issum | 4,224.87 mi (6,799.27 km) |
| Rockford to Itzehoe | 4,243.11 mi (6,828.63 km) |
| Rockford to Jena | 4,432.97 mi (7,134.18 km) |
| Rockford to Jever | 4,201.07 mi (6,760.96 km) |
| Rockford to Jork | 4,263.71 mi (6,861.77 km) |
| Rockford to Juchen | 4,244.12 mi (6,830.25 km) |
| Rockford to Julich | 4,245.62 mi (6,832.66 km) |
| Rockford to Juterbog | 4,440.90 mi (7,146.95 km) |
| Rockford to Kaarst | 4,243.95 mi (6,829.97 km) |
| Rockford to Kaiserslautern | 4,354.20 mi (7,007.40 km) |
| Rockford to Kalkar | 4,212.68 mi (6,779.66 km) |
| Rockford to Kall | 4,266.69 mi (6,866.58 km) |
| Rockford to Kaltenkirchen | 4,261.42 mi (6,858.10 km) |
