| Romeoville to Chivasso | 4,518.26 mi (7,271.43 km) |
| Romeoville to Ciampino | 4,847.75 mi (7,801.70 km) |
| Romeoville to Cicciano | 4,961.78 mi (7,985.22 km) |
| Romeoville to Cingoli | 4,804.73 mi (7,732.47 km) |
| Romeoville to Cinisello Balsamo | 4,556.45 mi (7,332.90 km) |
| Romeoville to Cinisi | 5,027.15 mi (8,090.42 km) |
| Romeoville to Cirie | 4,505.07 mi (7,250.21 km) |
| Romeoville to Ciro Marina | 5,137.59 mi (8,268.15 km) |
| Romeoville to Cislago | 4,542.60 mi (7,310.61 km) |
| Romeoville to Cisterna di Latina | 4,865.98 mi (7,831.04 km) |
| Romeoville to Cisternino | 5,087.34 mi (8,187.29 km) |
| Romeoville to Citta di Castello | 4,762.37 mi (7,664.29 km) |
| Romeoville to Citta Sant'Angelo | 4,874.40 mi (7,844.59 km) |
| Romeoville to Cittadella | 4,652.23 mi (7,487.04 km) |
| Romeoville to Cittanova | 5,141.94 mi (8,275.16 km) |
