| Rock Island to Collegno | 4,615.87 mi (7,428.53 km) |
| Rock Island to Cologno al Serio | 4,677.87 mi (7,528.31 km) |
| Rock Island to Cologno Monzese | 4,663.87 mi (7,505.77 km) |
| Rock Island to Colorno | 4,731.56 mi (7,614.72 km) |
| Rock Island to Comacchio | 4,810.82 mi (7,742.26 km) |
| Rock Island to Comiso | 5,253.84 mi (8,455.24 km) |
| Rock Island to Como | 4,644.77 mi (7,475.03 km) |
| Rock Island to Concordia Sagittaria | 4,789.90 mi (7,708.61 km) |
| Rock Island to Concorezzo | 4,663.56 mi (7,505.27 km) |
| Rock Island to Conegliano | 4,763.95 mi (7,666.83 km) |
| Rock Island to Conselice | 4,805.30 mi (7,733.39 km) |
| Rock Island to Conselve | 4,775.73 mi (7,685.79 km) |
| Rock Island to Conversano | 5,168.32 mi (8,317.60 km) |
| Rock Island to Copertino | 5,237.09 mi (8,428.28 km) |
| Rock Island to Copparo | 4,788.78 mi (7,706.80 km) |
