| Rockford to Rockville (Maryland) | 660.84 mi (1,063.51 km) |
| Rockford to Rockville Centre (New York) | 805.15 mi (1,295.76 km) |
| Rockford to Rockwall (Texas) | 760.64 mi (1,224.14 km) |
| Rockford to Rocky Mount (North Carolina) | 742.80 mi (1,195.43 km) |
| Rockford to Rocky Point (New York) | 837.04 mi (1,347.09 km) |
| Rockford to Rocky River (Ohio) | 374.94 mi (603.40 km) |
| Rockford to Roessleville (New York) | 777.54 mi (1,251.34 km) |
| Rockford to Rogers (Arkansas) | 492.37 mi (792.40 km) |
| Rockford to Rogers (Minnesota) | 302.74 mi (487.22 km) |
| Rockford to Rohnert Park (California) | 1,780.87 mi (2,866.03 km) |
| Rockford to Rolla (Missouri) | 330.32 mi (531.60 km) |
| Rockford to Rolling Meadows (Illinois) | 54.71 mi (88.05 km) |
| Rockford to Roma (Texas) | 1,230.77 mi (1,980.72 km) |
| Rockford to Rome (Georgia) | 590.82 mi (950.83 km) |
| Rockford to Rome (New York) | 691.19 mi (1,112.37 km) |
