| Romeoville to Carlsbad (California) | 1,696.82 mi (2,730.77 km) |
| Romeoville to Carlsbad (New Mexico) | 1,092.23 mi (1,757.78 km) |
| Romeoville to Carmel (Indiana) | 153.96 mi (247.77 km) |
| Romeoville to Carmichael (California) | 1,756.47 mi (2,826.77 km) |
| Romeoville to Carney (Maryland) | 626.66 mi (1,008.51 km) |
| Romeoville to Carnot-Moon (Pennsylvania) | 417.52 mi (671.93 km) |
| Romeoville to Carol Stream (Illinois) | 19.85 mi (31.94 km) |
| Romeoville to Carolina (Puerto Rico) | 2,067.03 mi (3,326.57 km) |
| Romeoville to Carolina Forest (South Carolina) | 739.16 mi (1,189.56 km) |
| Romeoville to Carpentersville (Illinois) | 35.30 mi (56.80 km) |
| Romeoville to Carpinteria (California) | 1,770.48 mi (2,849.32 km) |
| Romeoville to Carrboro (North Carolina) | 624.73 mi (1,005.40 km) |
| Romeoville to Carroll (Iowa) | 349.39 mi (562.28 km) |
| Romeoville to Carrollton (Georgia) | 580.07 mi (933.54 km) |
| Romeoville to Carrollton (Texas) | 767.52 mi (1,235.21 km) |
