| Rockford to Carrollwood (Florida) | 1,047.82 mi (1,686.30 km) |
| Rockford to Carson (California) | 1,681.52 mi (2,706.15 km) |
| Rockford to Carson City (Nevada) | 1,612.58 mi (2,595.19 km) |
| Rockford to Carteret (New Jersey) | 776.27 mi (1,249.28 km) |
| Rockford to Cartersville (Georgia) | 605.10 mi (973.81 km) |
| Rockford to Carthage (Missouri) | 450.08 mi (724.34 km) |
| Rockford to Cary (Illinois) | 41.80 mi (67.26 km) |
| Rockford to Cary (North Carolina) | 708.13 mi (1,139.63 km) |
| Rockford to Casa de Oro-Mount Helix (California) | 1,654.45 mi (2,662.58 km) |
| Rockford to Casa Grande (Arizona) | 1,394.67 mi (2,244.50 km) |
| Rockford to Casas Adobes (Arizona) | 1,381.30 mi (2,222.99 km) |
| Rockford to Cascades (Virginia) | 650.43 mi (1,046.76 km) |
| Rockford to Casper (Wyoming) | 877.75 mi (1,412.60 km) |
| Rockford to Casselberry (Florida) | 1,034.46 mi (1,664.80 km) |
| Rockford to Castaic (California) | 1,679.45 mi (2,702.82 km) |
