| Romeoville to Cehegin | 4,380.31 mi (7,049.42 km) |
| Romeoville to Cervello | 4,420.39 mi (7,113.93 km) |
| Romeoville to Cervera | 4,380.44 mi (7,049.64 km) |
| Romeoville to Ceuti | 4,404.69 mi (7,088.67 km) |
| Romeoville to Cheste | 4,377.64 mi (7,045.14 km) |
| Romeoville to Chiclana de la Frontera | 4,242.65 mi (6,827.89 km) |
| Romeoville to Chipiona | 4,217.65 mi (6,787.66 km) |
| Romeoville to Chiva | 4,376.39 mi (7,043.11 km) |
| Romeoville to Churriana de la Vega | 4,331.40 mi (6,970.71 km) |
| Romeoville to Ciempozuelos | 4,221.17 mi (6,793.32 km) |
| Romeoville to Cieza | 4,391.92 mi (7,068.11 km) |
| Romeoville to Cisterniga | 4,121.40 mi (6,632.75 km) |
| Romeoville to Ciudad de Melilla | 4,435.53 mi (7,138.29 km) |
| Romeoville to Ciudad Real | 4,250.77 mi (6,840.96 km) |
| Romeoville to Ciudad-Rodrigo | 4,073.90 mi (6,556.31 km) |
