| Rockford to Collegno | 4,520.94 mi (7,275.75 km) |
| Rockford to Cologno al Serio | 4,583.18 mi (7,375.91 km) |
| Rockford to Cologno Monzese | 4,569.13 mi (7,353.31 km) |
| Rockford to Colorno | 4,636.83 mi (7,462.25 km) |
| Rockford to Comacchio | 4,716.20 mi (7,589.99 km) |
| Rockford to Comiso | 5,158.59 mi (8,301.95 km) |
| Rockford to Como | 4,550.06 mi (7,322.62 km) |
| Rockford to Concordia Sagittaria | 4,695.55 mi (7,556.77 km) |
| Rockford to Concorezzo | 4,568.83 mi (7,352.83 km) |
| Rockford to Conegliano | 4,669.56 mi (7,514.93 km) |
| Rockford to Conselice | 4,710.63 mi (7,581.02 km) |
| Rockford to Conselve | 4,681.17 mi (7,533.62 km) |
| Rockford to Conversano | 5,073.61 mi (8,165.18 km) |
| Rockford to Copertino | 5,142.37 mi (8,275.84 km) |
| Rockford to Copparo | 4,694.17 mi (7,554.54 km) |
