| Romeoville to Castrovillari | 5,080.07 mi (8,175.58 km) |
| Romeoville to Catania | 5,139.72 mi (8,271.58 km) |
| Romeoville to Catanzaro | 5,137.84 mi (8,268.55 km) |
| Romeoville to Cattolica | 4,760.07 mi (7,660.59 km) |
| Romeoville to Cava de' Tirreni | 4,980.29 mi (8,015.00 km) |
| Romeoville to Cavallino | 5,136.56 mi (8,266.50 km) |
| Romeoville to Cavarzere | 4,685.20 mi (7,540.10 km) |
| Romeoville to Cave | 4,860.41 mi (7,822.08 km) |
| Romeoville to Cavriago | 4,642.93 mi (7,472.08 km) |
| Romeoville to Cavriglia | 4,729.88 mi (7,612.00 km) |
| Romeoville to Cazzago San Martino | 4,586.86 mi (7,381.83 km) |
| Romeoville to Ceccano | 4,887.32 mi (7,865.38 km) |
| Romeoville to Cecina | 4,699.71 mi (7,563.46 km) |
| Romeoville to Cefalu | 5,071.22 mi (8,161.34 km) |
| Romeoville to Ceglie Messapico | 5,093.77 mi (8,197.63 km) |
