| Romeoville to Clarksdale (Mississippi) | 531.22 mi (854.92 km) |
| Romeoville to Clarkston (Georgia) | 579.85 mi (933.19 km) |
| Romeoville to Clarksville (Indiana) | 259.87 mi (418.22 km) |
| Romeoville to Clarksville (Tennessee) | 352.14 mi (566.72 km) |
| Romeoville to Clawson (Michigan) | 261.34 mi (420.58 km) |
| Romeoville to Clay (Alabama) | 554.37 mi (892.18 km) |
| Romeoville to Clayton (California) | 1,802.47 mi (2,900.80 km) |
| Romeoville to Clayton (Missouri) | 237.65 mi (382.46 km) |
| Romeoville to Clayton (North Carolina) | 663.71 mi (1,068.14 km) |
| Romeoville to Clayton (Ohio) | 231.88 mi (373.18 km) |
| Romeoville to Clearfield (Utah) | 1,237.11 mi (1,990.93 km) |
| Romeoville to Clearlake (California) | 1,817.01 mi (2,924.19 km) |
| Romeoville to Clearwater (Florida) | 990.18 mi (1,593.53 km) |
| Romeoville to Cleburne (Texas) | 820.47 mi (1,320.41 km) |
| Romeoville to Clemmons (North Carolina) | 567.06 mi (912.60 km) |
