| Rockford to Candler-McAfee (Georgia) | 644.43 mi (1,037.11 km) |
| Rockford to Caño Martin Peña (Puerto Rico) | 2,128.72 mi (3,425.84 km) |
| Rockford to Cañon City (Colorado) | 889.04 mi (1,430.77 km) |
| Rockford to Canóvanas (Puerto Rico) | 2,137.78 mi (3,440.43 km) |
| Rockford to Canton (Georgia) | 606.48 mi (976.03 km) |
| Rockford to Canton (Illinois) | 127.67 mi (205.47 km) |
| Rockford to Canton (Mississippi) | 669.68 mi (1,077.75 km) |
| Rockford to Canton (Ohio) | 410.35 mi (660.39 km) |
| Rockford to Canyon (Texas) | 855.00 mi (1,375.99 km) |
| Rockford to Canyon Lake (California) | 1,636.69 mi (2,634.00 km) |
| Rockford to Canyon Lake (Texas) | 996.52 mi (1,603.75 km) |
| Rockford to Cape Coral (Florida) | 1,150.54 mi (1,851.61 km) |
| Rockford to Cape Girardeau (Missouri) | 342.93 mi (551.89 km) |
| Rockford to Carbondale (Illinois) | 313.62 mi (504.73 km) |
| Rockford to Carlisle (Pennsylvania) | 631.96 mi (1,017.03 km) |
