| Romeoville to Cullman (Alabama) | 519.58 mi (836.18 km) |
| Romeoville to Culpeper (Virginia) | 576.63 mi (928.00 km) |
| Romeoville to Culver City (California) | 1,725.25 mi (2,776.51 km) |
| Romeoville to Cumberland (Maryland) | 508.20 mi (817.87 km) |
| Romeoville to Cupertino (California) | 1,822.84 mi (2,933.59 km) |
| Romeoville to Cutler Bay (Florida) | 1,194.60 mi (1,922.52 km) |
| Romeoville to Cutlerville (Michigan) | 149.58 mi (240.73 km) |
| Romeoville to Cuyahoga Falls (Ohio) | 342.43 mi (551.08 km) |
| Romeoville to Cypress (California) | 1,712.84 mi (2,756.56 km) |
| Romeoville to Cypress Gardens (Florida) | 1,008.68 mi (1,623.31 km) |
| Romeoville to Cypress Lake (Florida) | 1,100.69 mi (1,771.39 km) |
| Romeoville to D'Iberville (Mississippi) | 772.43 mi (1,243.11 km) |
| Romeoville to Dakota Ridge (Colorado) | 902.54 mi (1,452.49 km) |
| Romeoville to Dale City (Virginia) | 603.77 mi (971.68 km) |
| Romeoville to Dallas (Georgia) | 561.95 mi (904.37 km) |
