| Romeoville to Cloverleaf (Texas) | 908.62 mi (1,462.28 km) |
| Romeoville to Cloverly (Maryland) | 609.31 mi (980.60 km) |
| Romeoville to Clovis (California) | 1,712.63 mi (2,756.22 km) |
| Romeoville to Clovis (New Mexico) | 957.96 mi (1,541.69 km) |
| Romeoville to Clute (Texas) | 962.33 mi (1,548.72 km) |
| Romeoville to Coachella (California) | 1,620.36 mi (2,607.73 km) |
| Romeoville to Coalinga (California) | 1,763.22 mi (2,837.63 km) |
| Romeoville to Coamo (Puerto Rico) | 2,071.76 mi (3,334.18 km) |
| Romeoville to Coatesville (Pennsylvania) | 651.60 mi (1,048.65 km) |
| Romeoville to Cockeysville (Maryland) | 619.69 mi (997.29 km) |
| Romeoville to Cocoa (Florida) | 1,004.14 mi (1,616.01 km) |
| Romeoville to Cocoa Beach (Florida) | 1,010.54 mi (1,626.31 km) |
| Romeoville to Coconut Creek (Florida) | 1,152.31 mi (1,854.47 km) |
| Romeoville to Coeur d'Alene (Idaho) | 1,461.52 mi (2,352.10 km) |
| Romeoville to Cohoes (New York) | 739.92 mi (1,190.78 km) |
