| Romeoville to Sumter (South Carolina) | 677.31 mi (1,090.02 km) |
| Romeoville to Sun City (Arizona) | 1,428.36 mi (2,298.72 km) |
| Romeoville to Sun City Center (Florida) | 1,014.78 mi (1,633.12 km) |
| Romeoville to Sun City West (Arizona) | 1,430.31 mi (2,301.86 km) |
| Romeoville to Sun Lakes (Arizona) | 1,421.83 mi (2,288.21 km) |
| Romeoville to Sun Prairie (Wisconsin) | 121.82 mi (196.05 km) |
| Romeoville to Sun Valley (Nevada) | 1,657.79 mi (2,667.95 km) |
| Romeoville to Sun Village (California) | 1,685.75 mi (2,712.95 km) |
| Romeoville to Sunland Park (New Mexico) | 1,224.18 mi (1,970.12 km) |
| Romeoville to Sunny Isles Beach (Florida) | 1,175.70 mi (1,892.10 km) |
| Romeoville to Sunnyside (Washington) | 1,607.69 mi (2,587.32 km) |
| Romeoville to Sunnyvale (California) | 1,820.18 mi (2,929.29 km) |
| Romeoville to Sunrise (Florida) | 1,157.88 mi (1,863.43 km) |
| Romeoville to Sunrise Manor (Nevada) | 1,490.44 mi (2,398.63 km) |
| Romeoville to Sunset (Florida) | 1,185.81 mi (1,908.38 km) |
