| Rockford to Commerce (California) | 1,671.02 mi (2,689.25 km) |
| Rockford to Commerce City (Colorado) | 837.23 mi (1,347.39 km) |
| Rockford to Compton (California) | 1,678.24 mi (2,700.87 km) |
| Rockford to Comstock Park (Michigan) | 180.39 mi (290.31 km) |
| Rockford to Concord (California) | 1,754.16 mi (2,823.05 km) |
| Rockford to Concord (Missouri) | 267.74 mi (430.89 km) |
| Rockford to Concord (New Hampshire) | 889.09 mi (1,430.85 km) |
| Rockford to Concord (North Carolina) | 655.71 mi (1,055.26 km) |
| Rockford to Conneaut (Ohio) | 435.99 mi (701.66 km) |
| Rockford to Connersville (Indiana) | 272.35 mi (438.31 km) |
| Rockford to Conroe (Texas) | 898.11 mi (1,445.37 km) |
| Rockford to Converse (Texas) | 1,020.23 mi (1,641.90 km) |
| Rockford to Conway (Arkansas) | 529.16 mi (851.60 km) |
| Rockford to Conway (Florida) | 1,044.80 mi (1,681.44 km) |
| Rockford to Conway (South Carolina) | 796.16 mi (1,281.30 km) |
