| Romeoville to South Plainfield (New Jersey) | 715.43 mi (1,151.38 km) |
| Romeoville to South Portland (Maine) | 914.01 mi (1,470.96 km) |
| Romeoville to South Riding (Virginia) | 588.41 mi (946.95 km) |
| Romeoville to South River (New Jersey) | 718.99 mi (1,157.11 km) |
| Romeoville to South Salt Lake (Utah) | 1,235.54 mi (1,988.41 km) |
| Romeoville to South San Francisco (California) | 1,834.22 mi (2,951.89 km) |
| Romeoville to South San Jose Hills (California) | 1,699.86 mi (2,735.66 km) |
| Romeoville to South Sioux City (Nebraska) | 430.18 mi (692.31 km) |
| Romeoville to South St. Paul (Minnesota) | 335.19 mi (539.43 km) |
| Romeoville to South Valley (New Mexico) | 1,103.32 mi (1,775.63 km) |
| Romeoville to South Venice (Florida) | 1,058.12 mi (1,702.88 km) |
| Romeoville to South Whittier (California) | 1,708.80 mi (2,750.05 km) |
| Romeoville to South Yarmouth (Massachusetts) | 922.42 mi (1,484.50 km) |
| Romeoville to Southaven (Mississippi) | 472.65 mi (760.65 km) |
| Romeoville to Southchase (Florida) | 990.44 mi (1,593.95 km) |
