| Rockford to Carlsbad (California) | 1,657.26 mi (2,667.09 km) |
| Rockford to Carlsbad (New Mexico) | 1,073.70 mi (1,727.95 km) |
| Rockford to Carmel (Indiana) | 219.54 mi (353.31 km) |
| Rockford to Carmichael (California) | 1,704.43 mi (2,743.02 km) |
| Rockford to Carney (Maryland) | 683.87 mi (1,100.58 km) |
| Rockford to Carnot-Moon (Pennsylvania) | 473.82 mi (762.54 km) |
| Rockford to Carol Stream (Illinois) | 53.35 mi (85.87 km) |
| Rockford to Carolina (Puerto Rico) | 2,132.82 mi (3,432.44 km) |
| Rockford to Carolina Forest (South Carolina) | 804.94 mi (1,295.43 km) |
| Rockford to Carpentersville (Illinois) | 40.76 mi (65.59 km) |
| Rockford to Carpinteria (California) | 1,726.69 mi (2,778.84 km) |
| Rockford to Carrboro (North Carolina) | 690.33 mi (1,110.97 km) |
| Rockford to Carroll (Iowa) | 297.30 mi (478.46 km) |
| Rockford to Carrollton (Georgia) | 637.41 mi (1,025.82 km) |
| Rockford to Carrollton (Texas) | 770.03 mi (1,239.24 km) |
