| Rockford to Cocentaina | 4,437.91 mi (7,142.12 km) |
| Rockford to Coin | 4,324.34 mi (6,959.36 km) |
| Rockford to Colindres | 4,131.22 mi (6,648.55 km) |
| Rockford to Collado-Villalba | 4,207.74 mi (6,771.71 km) |
| Rockford to Colmenar Viejo | 4,217.51 mi (6,787.43 km) |
| Rockford to Colmenarejo | 4,210.05 mi (6,775.42 km) |
| Rockford to Conil de la Frontera | 4,278.14 mi (6,885.00 km) |
| Rockford to Consuegra | 4,269.46 mi (6,871.03 km) |
| Rockford to Corbera de Llobregat | 4,435.78 mi (7,138.70 km) |
| Rockford to Cordoba | 4,276.34 mi (6,882.10 km) |
| Rockford to Coria del Rio | 4,241.00 mi (6,825.22 km) |
| Rockford to Crevillente | 4,441.11 mi (7,147.28 km) |
| Rockford to Cuarte de Huerva | 4,307.22 mi (6,931.81 km) |
| Rockford to Cubellas | 4,432.92 mi (7,134.10 km) |
| Rockford to Cuellar | 4,166.01 mi (6,704.55 km) |
