| Rockford to Clarksdale (Mississippi) | 563.26 mi (906.47 km) |
| Rockford to Clarkston (Georgia) | 639.72 mi (1,029.52 km) |
| Rockford to Clarksville (Indiana) | 322.74 mi (519.41 km) |
| Rockford to Clarksville (Tennessee) | 403.75 mi (649.78 km) |
| Rockford to Clawson (Michigan) | 302.28 mi (486.47 km) |
| Rockford to Clay (Alabama) | 606.59 mi (976.21 km) |
| Rockford to Clayton (California) | 1,751.27 mi (2,818.39 km) |
| Rockford to Clayton (Missouri) | 258.50 mi (416.01 km) |
| Rockford to Clayton (North Carolina) | 729.21 mi (1,173.56 km) |
| Rockford to Clayton (Ohio) | 296.78 mi (477.63 km) |
| Rockford to Clearfield (Utah) | 1,183.89 mi (1,905.28 km) |
| Rockford to Clearlake (California) | 1,763.96 mi (2,838.82 km) |
| Rockford to Clearwater (Florida) | 1,048.20 mi (1,686.91 km) |
| Rockford to Cleburne (Texas) | 822.92 mi (1,324.37 km) |
| Rockford to Clemmons (North Carolina) | 632.91 mi (1,018.57 km) |
