| Romeoville to Sugar Hill (Georgia) | 564.52 mi (908.51 km) |
| Romeoville to Sugar Land (Texas) | 932.34 mi (1,500.46 km) |
| Romeoville to Sugarland Run (Virginia) | 592.24 mi (953.12 km) |
| Romeoville to Sugarmill Woods (Florida) | 945.27 mi (1,521.27 km) |
| Romeoville to Suisun City (California) | 1,799.79 mi (2,896.49 km) |
| Romeoville to Suitland (Maryland) | 619.52 mi (997.02 km) |
| Romeoville to Sulphur (Louisiana) | 840.54 mi (1,352.72 km) |
| Romeoville to Sulphur Springs (Texas) | 716.40 mi (1,152.93 km) |
| Romeoville to Summerfield (Maryland) | 620.87 mi (999.19 km) |
| Romeoville to Summerfield (North Carolina) | 578.59 mi (931.15 km) |
| Romeoville to Summerlin South (Nevada) | 1,506.47 mi (2,424.44 km) |
| Romeoville to Summerville (South Carolina) | 737.47 mi (1,186.84 km) |
| Romeoville to Summit (Illinois) | 18.23 mi (29.34 km) |
| Romeoville to Summit (New Jersey) | 716.36 mi (1,152.87 km) |
| Romeoville to Sumner (Washington) | 1,713.36 mi (2,757.38 km) |
