| Rockford to Cognac | 4,178.99 mi (6,725.44 km) |
| Rockford to Cogolin | 4,553.58 mi (7,328.27 km) |
| Rockford to Colmar | 4,392.21 mi (7,068.58 km) |
| Rockford to Colombes | 4,164.88 mi (6,702.72 km) |
| Rockford to Colomiers | 4,325.54 mi (6,961.28 km) |
| Rockford to Combs-la-Ville | 4,186.01 mi (6,736.73 km) |
| Rockford to Comines | 4,127.61 mi (6,642.75 km) |
| Rockford to Compiegne | 4,169.05 mi (6,709.44 km) |
| Rockford to Concarneau | 3,956.45 mi (6,367.30 km) |
| Rockford to Conde-sur-l'Escaut | 4,160.65 mi (6,695.92 km) |
| Rockford to Conflans-Sainte-Honorine | 4,156.20 mi (6,688.75 km) |
| Rockford to Corbas | 4,391.55 mi (7,067.52 km) |
| Rockford to Corbeil-Essonnes | 4,185.03 mi (6,735.15 km) |
| Rockford to Cormeilles-en-Parisis | 4,161.10 mi (6,696.64 km) |
| Rockford to Cosne sur Loire | 4,246.72 mi (6,834.44 km) |
