| Romeoville to Cibolo (Texas) | 1,007.33 mi (1,621.14 km) |
| Romeoville to Cicero (Illinois) | 22.89 mi (36.84 km) |
| Romeoville to Cimarron Hills (Colorado) | 894.62 mi (1,439.76 km) |
| Romeoville to Cincinnati (Ohio) | 255.65 mi (411.43 km) |
| Romeoville to Cinco Ranch (Texas) | 926.40 mi (1,490.89 km) |
| Romeoville to Circleville (Ohio) | 304.88 mi (490.66 km) |
| Romeoville to Citrus (California) | 1,695.86 mi (2,729.22 km) |
| Romeoville to Citrus Heights (California) | 1,753.20 mi (2,821.51 km) |
| Romeoville to Citrus Park (Florida) | 987.44 mi (1,589.13 km) |
| Romeoville to Claiborne (Louisiana) | 667.48 mi (1,074.20 km) |
| Romeoville to Claremont (California) | 1,686.67 mi (2,714.43 km) |
| Romeoville to Claremont (New Hampshire) | 810.68 mi (1,304.66 km) |
| Romeoville to Claremore (Oklahoma) | 545.22 mi (877.44 km) |
| Romeoville to Clarksburg (Maryland) | 593.11 mi (954.52 km) |
| Romeoville to Clarksburg (West Virginia) | 439.56 mi (707.41 km) |
