| Romeoville to Cortona | 4,760.11 mi (7,660.66 km) |
| Romeoville to Cosenza | 5,105.51 mi (8,216.52 km) |
| Romeoville to Cossato | 4,514.40 mi (7,265.22 km) |
| Romeoville to Costa Volpino | 4,579.58 mi (7,370.12 km) |
| Romeoville to Creazzo | 4,645.50 mi (7,476.21 km) |
| Romeoville to Crema | 4,582.20 mi (7,374.33 km) |
| Romeoville to Cremona | 4,605.46 mi (7,411.77 km) |
| Romeoville to Crevalcore | 4,666.46 mi (7,509.95 km) |
| Romeoville to Crispiano | 5,085.55 mi (8,184.41 km) |
| Romeoville to Crosia | 5,114.13 mi (8,230.39 km) |
| Romeoville to Crotone | 5,150.25 mi (8,288.53 km) |
| Romeoville to Cuneo | 4,536.93 mi (7,301.48 km) |
| Romeoville to Cuorgne | 4,500.92 mi (7,243.54 km) |
| Romeoville to Cusano Milanino | 4,555.14 mi (7,330.79 km) |
| Romeoville to Cutro | 5,147.17 mi (8,283.57 km) |
