| Romeoville to Security-Widefield (Colorado) | 897.73 mi (1,444.75 km) |
| Romeoville to Sedalia (Missouri) | 338.06 mi (544.05 km) |
| Romeoville to Sedro-Woolley (Washington) | 1,716.06 mi (2,761.74 km) |
| Romeoville to Seguin (Texas) | 998.23 mi (1,606.49 km) |
| Romeoville to Selden (New York) | 782.71 mi (1,259.65 km) |
| Romeoville to Selma (Alabama) | 639.40 mi (1,029.02 km) |
| Romeoville to Selma (California) | 1,715.50 mi (2,760.83 km) |
| Romeoville to Selma (Texas) | 1,009.16 mi (1,624.09 km) |
| Romeoville to Seminole (Florida) | 998.80 mi (1,607.41 km) |
| Romeoville to Seven Hills (Ohio) | 332.88 mi (535.72 km) |
| Romeoville to Seven Oaks (South Carolina) | 646.54 mi (1,040.50 km) |
| Romeoville to Severn (Maryland) | 623.94 mi (1,004.14 km) |
| Romeoville to Severna Park (Maryland) | 631.48 mi (1,016.27 km) |
| Romeoville to Sevierville (Tennessee) | 465.83 mi (749.68 km) |
| Romeoville to Seymour (Indiana) | 218.94 mi (352.35 km) |
