| Rock Island to South Plainfield (New Jersey) | 843.81 mi (1,357.98 km) |
| Rock Island to South Portland (Maine) | 1,040.98 mi (1,675.30 km) |
| Rock Island to South Riding (Virginia) | 711.31 mi (1,144.75 km) |
| Rock Island to South River (New Jersey) | 847.24 mi (1,363.49 km) |
| Rock Island to South Salt Lake (Utah) | 1,108.49 mi (1,783.94 km) |
| Rock Island to South San Francisco (California) | 1,706.38 mi (2,746.15 km) |
| Rock Island to South San Jose Hills (California) | 1,571.34 mi (2,528.83 km) |
| Rock Island to South Sioux City (Nebraska) | 307.18 mi (494.36 km) |
| Rock Island to South St. Paul (Minnesota) | 266.63 mi (429.10 km) |
| Rock Island to South Valley (New Mexico) | 978.93 mi (1,575.44 km) |
| Rock Island to South Venice (Florida) | 1,099.13 mi (1,768.87 km) |
| Rock Island to South Whittier (California) | 1,580.30 mi (2,543.24 km) |
| Rock Island to South Yarmouth (Massachusetts) | 1,051.23 mi (1,691.79 km) |
| Rock Island to Southaven (Mississippi) | 451.57 mi (726.74 km) |
| Rock Island to Southchase (Florida) | 1,042.18 mi (1,677.23 km) |
