| Rockford to Cordele (Georgia) | 768.93 mi (1,237.47 km) |
| Rockford to Corinth (Mississippi) | 506.09 mi (814.48 km) |
| Rockford to Corinth (Texas) | 766.13 mi (1,232.96 km) |
| Rockford to Cornelius (North Carolina) | 642.57 mi (1,034.12 km) |
| Rockford to Cornelius (Oregon) | 1,694.40 mi (2,726.88 km) |
| Rockford to Corning (New York) | 614.13 mi (988.34 km) |
| Rockford to Corona (California) | 1,646.01 mi (2,649.00 km) |
| Rockford to Coronado (California) | 1,667.53 mi (2,683.62 km) |
| Rockford to Corpus Christi (Texas) | 1,107.60 mi (1,782.51 km) |
| Rockford to Corsicana (Texas) | 811.96 mi (1,306.72 km) |
| Rockford to Cortland (New York) | 656.93 mi (1,057.22 km) |
| Rockford to Corvallis (Oregon) | 1,711.94 mi (2,755.11 km) |
| Rockford to Coshocton (Ohio) | 399.24 mi (642.51 km) |
| Rockford to Costa Mesa (California) | 1,670.06 mi (2,687.71 km) |
| Rockford to Coto de Caza (California) | 1,656.05 mi (2,665.16 km) |
